diff --git a/package-lock.json b/package-lock.json
index f19757b..dbba975 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -24,12 +24,51 @@
         "js-tokens": "^4.0.0"
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+      "requires": {
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+        "glob-to-regexp": "^0.3.0"
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+      "resolved": "https://registry.npmjs.org/@nodelib/fs.stat/-/fs.stat-1.1.3.tgz",
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       "dev": true
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+    "@types/events": {
+      "version": "3.0.0",
+      "resolved": "https://registry.npmjs.org/@types/events/-/events-3.0.0.tgz",
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+      "dev": true
+    },
+    "@types/glob": {
+      "version": "7.1.1",
+      "resolved": "https://registry.npmjs.org/@types/glob/-/glob-7.1.1.tgz",
+      "integrity": "sha512-1Bh06cbWJUHMC97acuD6UMG29nMt0Aqz1vF3guLfG+kHHJhy3AyohZFFxYk2f7Q1SQIrNwvncxAE0N/9s70F2w==",
+      "dev": true,
+      "requires": {
+        "@types/events": "*",
+        "@types/minimatch": "*",
+        "@types/node": "*"
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+    "@types/minimatch": {
+      "version": "3.0.3",
+      "resolved": "https://registry.npmjs.org/@types/minimatch/-/minimatch-3.0.3.tgz",
+      "integrity": "sha512-tHq6qdbT9U1IRSGf14CL0pUlULksvY9OZ+5eEgl1N7t+OA3tGvNpxJCzuKQlsNgCVwbAs670L1vcVQi8j9HjnA==",
+      "dev": true
+    },
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       "resolved": "https://registry.npmjs.org/@types/node/-/node-12.0.12.tgz",
@@ -66,6 +105,15 @@
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+      "resolved": "https://registry.npmjs.org/ansi-align/-/ansi-align-2.0.0.tgz",
+      "integrity": "sha1-w2rsy6VjuJzrVW82kPCx2eNUf38=",
+      "dev": true,
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@@ -102,6 +150,30 @@
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+      "resolved": "https://registry.npmjs.org/arr-diff/-/arr-diff-4.0.0.tgz",
+      "integrity": "sha1-1kYQdP6/7HHn4VI1dhoyml3HxSA=",
+      "dev": true
+    },
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+      "resolved": "https://registry.npmjs.org/arr-flatten/-/arr-flatten-1.1.0.tgz",
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+      "dev": true
+    },
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+      "resolved": "https://registry.npmjs.org/arr-union/-/arr-union-3.1.0.tgz",
+      "integrity": "sha1-45sJrqne+Gao8gbiiK9jkZuuOcQ=",
+      "dev": true
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+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/array-find-index/-/array-find-index-1.0.2.tgz",
+      "integrity": "sha1-3wEKoSh+Fku9pvlyOwqWoexBh6E=",
+      "dev": true
+    },
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@@ -112,24 +184,141 @@
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+      "resolved": "https://registry.npmjs.org/array-union/-/array-union-1.0.2.tgz",
+      "integrity": "sha1-mjRBDk9OPaI96jdb5b5w8kd47Dk=",
+      "dev": true,
+      "requires": {
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+      }
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+    "array-uniq": {
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+      "resolved": "https://registry.npmjs.org/array-uniq/-/array-uniq-1.0.3.tgz",
+      "integrity": "sha1-r2rId6Jcx/dOBYiUdThY39sk/bY=",
+      "dev": true
+    },
+    "array-unique": {
+      "version": "0.3.2",
+      "resolved": "https://registry.npmjs.org/array-unique/-/array-unique-0.3.2.tgz",
+      "integrity": "sha1-qJS3XUvE9s1nnvMkSp/Y9Gri1Cg=",
+      "dev": true
+    },
+    "arrify": {
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/arrify/-/arrify-1.0.1.tgz",
+      "integrity": "sha1-iYUI2iIm84DfkEcoRWhJwVAaSw0=",
+      "dev": true
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       "dev": true
     },
+    "assign-symbols": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/assign-symbols/-/assign-symbols-1.0.0.tgz",
+      "integrity": "sha1-WWZ/QfrdTyDMvCu5a41Pf3jsA2c=",
+      "dev": true
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+      "resolved": "https://registry.npmjs.org/atob/-/atob-2.1.2.tgz",
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+      "resolved": "https://registry.npmjs.org/boxen/-/boxen-1.3.0.tgz",
+      "integrity": "sha512-TNPjfTr432qx7yOjQyaXm3dSR0MH9vXp7eT1BFSl/C51g+EFnOR9hTg1IreahGBmDNCehscshe45f+C1TBZbLw==",
+      "dev": true,
+      "requires": {
+        "ansi-align": "^2.0.0",
+        "camelcase": "^4.0.0",
+        "chalk": "^2.0.1",
+        "cli-boxes": "^1.0.0",
+        "string-width": "^2.0.0",
+        "term-size": "^1.2.0",
+        "widest-line": "^2.0.0"
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+          "resolved": "https://registry.npmjs.org/camelcase/-/camelcase-4.1.0.tgz",
+          "integrity": "sha1-1UVjW+HjPFQmScaRc+Xeas+uNN0=",
+          "dev": true
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     "brace-expansion": {
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       "resolved": "https://registry.npmjs.org/brace-expansion/-/brace-expansion-1.1.11.tgz",
@@ -140,6 +329,35 @@
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+      "version": "2.3.2",
+      "resolved": "https://registry.npmjs.org/braces/-/braces-2.3.2.tgz",
+      "integrity": "sha512-aNdbnj9P8PjdXU4ybaWLK2IF3jc/EoDYbC7AazW6to3TRsfXxscC9UXOB5iDiEQrkyIbWp2SLQda4+QAa7nc3w==",
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+      "requires": {
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+        "array-unique": "^0.3.2",
+        "extend-shallow": "^2.0.1",
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+        "isobject": "^3.0.1",
+        "repeat-element": "^1.1.2",
+        "snapdragon": "^0.8.1",
+        "snapdragon-node": "^2.0.1",
+        "split-string": "^3.0.2",
+        "to-regex": "^3.0.1"
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+          "version": "2.0.1",
+          "resolved": "https://registry.npmjs.org/extend-shallow/-/extend-shallow-2.0.1.tgz",
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+          "dev": true,
+          "requires": {
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+      "resolved": "https://registry.npmjs.org/cache-base/-/cache-base-1.0.1.tgz",
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+      "requires": {
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+        "component-emitter": "^1.2.1",
+        "get-value": "^2.0.6",
+        "has-value": "^1.0.0",
+        "isobject": "^3.0.1",
+        "set-value": "^2.0.0",
+        "to-object-path": "^0.3.0",
+        "union-value": "^1.0.0",
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+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/call-me-maybe/-/call-me-maybe-1.0.1.tgz",
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+      "version": "4.2.0",
+      "resolved": "https://registry.npmjs.org/camelcase-keys/-/camelcase-keys-4.2.0.tgz",
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+      "requires": {
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+        "map-obj": "^2.0.0",
+        "quick-lru": "^1.0.0"
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+          "resolved": "https://registry.npmjs.org/camelcase/-/camelcase-4.1.0.tgz",
+          "integrity": "sha1-1UVjW+HjPFQmScaRc+Xeas+uNN0=",
+          "dev": true
+        }
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+      "resolved": "https://registry.npmjs.org/capture-stack-trace/-/capture-stack-trace-1.0.1.tgz",
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@@ -225,6 +491,41 @@
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+      "resolved": "https://registry.npmjs.org/ci-info/-/ci-info-1.6.0.tgz",
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+      "resolved": "https://registry.npmjs.org/class-utils/-/class-utils-0.3.6.tgz",
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@@ -257,6 +558,16 @@
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+      }
+    },
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       "version": "4.0.2",
       "resolved": "https://registry.npmjs.org/terser/-/terser-4.0.2.tgz",
@@ -2001,6 +3771,12 @@
       "integrity": "sha1-DdTJ/6q8NXlgsbckEV1+Doai4fU=",
       "dev": true
     },
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+      "resolved": "https://registry.npmjs.org/timed-out/-/timed-out-4.0.1.tgz",
+      "integrity": "sha1-8y6srFoXW+ol1/q1Zas+2HQe9W8=",
+      "dev": true
+    },
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       "resolved": "https://registry.npmjs.org/tmp/-/tmp-0.0.33.tgz",
@@ -2010,6 +3786,178 @@
         "os-tmpdir": "~1.0.2"
       }
     },
+    "to-object-path": {
+      "version": "0.3.0",
+      "resolved": "https://registry.npmjs.org/to-object-path/-/to-object-path-0.3.0.tgz",
+      "integrity": "sha1-KXWIt7Dn4KwI4E5nL4XB9JmeF68=",
+      "dev": true,
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+          "dev": true
+        },
+        "kind-of": {
+          "version": "3.2.2",
+          "resolved": "https://registry.npmjs.org/kind-of/-/kind-of-3.2.2.tgz",
+          "integrity": "sha1-MeohpzS6ubuw8yRm2JOupR5KPGQ=",
+          "dev": true,
+          "requires": {
+            "is-buffer": "^1.1.5"
+          }
+        }
+      }
+    },
+    "to-regex": {
+      "version": "3.0.2",
+      "resolved": "https://registry.npmjs.org/to-regex/-/to-regex-3.0.2.tgz",
+      "integrity": "sha512-FWtleNAtZ/Ki2qtqej2CXTOayOH9bHDQF+Q48VpWyDXjbYxA4Yz8iDB31zXOBUlOHHKidDbqGVrTUvQMPmBGBw==",
+      "dev": true,
+      "requires": {
+        "define-property": "^2.0.2",
+        "extend-shallow": "^3.0.2",
+        "regex-not": "^1.0.2",
+        "safe-regex": "^1.1.0"
+      }
+    },
+    "to-regex-range": {
+      "version": "2.1.1",
+      "resolved": "https://registry.npmjs.org/to-regex-range/-/to-regex-range-2.1.1.tgz",
+      "integrity": "sha1-fIDBe53+vlmeJzZ+DU3VWQFB2zg=",
+      "dev": true,
+      "requires": {
+        "is-number": "^3.0.0",
+        "repeat-string": "^1.6.1"
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+    "trim-newlines": {
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/trim-newlines/-/trim-newlines-2.0.0.tgz",
+      "integrity": "sha1-tAPQuRvlDDMd/EuC7s6yLD3hbSA=",
+      "dev": true
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+      "resolved": "https://registry.npmjs.org/tsd/-/tsd-0.7.4.tgz",
+      "integrity": "sha512-cqr1s2GHtVkU3L/4BXDaeJOjFEuZ7iOVC+hwmyx4G7Eo26mSXCFNnwFm4EasK/MW2HdY3AQWux+AjYzDYLzZow==",
+      "dev": true,
+      "requires": {
+        "eslint-formatter-pretty": "^1.3.0",
+        "globby": "^9.1.0",
+        "meow": "^5.0.0",
+        "path-exists": "^3.0.0",
+        "read-pkg-up": "^4.0.0",
+        "typescript": "^3.0.1",
+        "update-notifier": "^2.5.0"
+      },
+      "dependencies": {
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+          "dev": true,
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+          }
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+          "integrity": "sha1-L19Fq5HjMhYjT9U62rZo607AmTs=",
+          "dev": true,
+          "requires": {
+            "graceful-fs": "^4.1.2",
+            "parse-json": "^4.0.0",
+            "pify": "^3.0.0",
+            "strip-bom": "^3.0.0"
+          }
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+        "locate-path": {
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+          "dev": true,
+          "requires": {
+            "p-locate": "^3.0.0",
+            "path-exists": "^3.0.0"
+          }
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+          "resolved": "https://registry.npmjs.org/p-limit/-/p-limit-2.2.0.tgz",
+          "integrity": "sha512-pZbTJpoUsCzV48Mc9Nh51VbwO0X9cuPFE8gYwx9BTCt9SF8/b7Zljd2fVgOxhIF/HDTKgpVzs+GPhyKfjLLFRQ==",
+          "dev": true,
+          "requires": {
+            "p-try": "^2.0.0"
+          }
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+        "p-locate": {
+          "version": "3.0.0",
+          "resolved": "https://registry.npmjs.org/p-locate/-/p-locate-3.0.0.tgz",
+          "integrity": "sha512-x+12w/To+4GFfgJhBEpiDcLozRJGegY+Ei7/z0tSLkMmxGZNybVMSfWj9aJn8Z5Fc7dBUNJOOVgPv2H7IwulSQ==",
+          "dev": true,
+          "requires": {
+            "p-limit": "^2.0.0"
+          }
+        },
+        "p-try": {
+          "version": "2.2.0",
+          "resolved": "https://registry.npmjs.org/p-try/-/p-try-2.2.0.tgz",
+          "integrity": "sha512-R4nPAVTAU0B9D35/Gk3uJf/7XYbQcyohSKdvAxIRSNghFl4e71hVoGnBNQz9cWaXxO2I10KTC+3jMdvvoKw6dQ==",
+          "dev": true
+        },
+        "parse-json": {
+          "version": "4.0.0",
+          "resolved": "https://registry.npmjs.org/parse-json/-/parse-json-4.0.0.tgz",
+          "integrity": "sha1-vjX1Qlvh9/bHRxhPmKeIy5lHfuA=",
+          "dev": true,
+          "requires": {
+            "error-ex": "^1.3.1",
+            "json-parse-better-errors": "^1.0.1"
+          }
+        },
+        "path-type": {
+          "version": "3.0.0",
+          "resolved": "https://registry.npmjs.org/path-type/-/path-type-3.0.0.tgz",
+          "integrity": "sha512-T2ZUsdZFHgA3u4e5PfPbjd7HDDpxPnQb5jN0SrDsjNSuVXHJqtwTnWqG0B1jZrgmJ/7lj1EmVIByWt1gxGkWvg==",
+          "dev": true,
+          "requires": {
+            "pify": "^3.0.0"
+          }
+        },
+        "pify": {
+          "version": "3.0.0",
+          "resolved": "https://registry.npmjs.org/pify/-/pify-3.0.0.tgz",
+          "integrity": "sha1-5aSs0sEB/fPZpNB/DbxNtJ3SgXY=",
+          "dev": true
+        },
+        "read-pkg": {
+          "version": "3.0.0",
+          "resolved": "https://registry.npmjs.org/read-pkg/-/read-pkg-3.0.0.tgz",
+          "integrity": "sha1-nLxoaXj+5l0WwA4rGcI3/Pbjg4k=",
+          "dev": true,
+          "requires": {
+            "load-json-file": "^4.0.0",
+            "normalize-package-data": "^2.3.2",
+            "path-type": "^3.0.0"
+          }
+        },
+        "read-pkg-up": {
+          "version": "4.0.0",
+          "resolved": "https://registry.npmjs.org/read-pkg-up/-/read-pkg-up-4.0.0.tgz",
+          "integrity": "sha512-6etQSH7nJGsK0RbG/2TeDzZFa8shjQ1um+SwQQ5cwKy0dhSXdOncEhb1CPpvQG4h7FyOV6EB6YlV0yJvZQNAkA==",
+          "dev": true,
+          "requires": {
+            "find-up": "^3.0.0",
+            "read-pkg": "^3.0.0"
+          }
+        }
+      }
+    },
     "tslib": {
       "version": "1.9.3",
       "resolved": "https://registry.npmjs.org/tslib/-/tslib-1.9.3.tgz",
@@ -2032,9 +3980,9 @@
       "dev": true
     },
     "typescript": {
-      "version": "3.4.5",
-      "resolved": "https://registry.npmjs.org/typescript/-/typescript-3.4.5.tgz",
-      "integrity": "sha512-YycBxUb49UUhdNMU5aJ7z5Ej2XGmaIBL0x34vZ82fn3hGvD+bgrMrVDpatgz2f7YxUMJxMkbWxJZeAvDxVe7Vw==",
+      "version": "3.5.3",
+      "resolved": "https://registry.npmjs.org/typescript/-/typescript-3.5.3.tgz",
+      "integrity": "sha512-ACzBtm/PhXBDId6a6sDJfroT2pOWt/oOnk4/dElG5G33ZL776N3Y6/6bKZJBFpd+b05F3Ct9qDjMeJmRWtE2/g==",
       "dev": true
     },
     "unicode-canonical-property-names-ecmascript": {
@@ -2065,6 +4013,91 @@
       "integrity": "sha512-L5RAqCfXqAwR3RriF8pM0lU0w4Ryf/GgzONwi6KnL1taJQa7x1TCxdJnILX59WIGOwR57IVxn7Nej0fz1Ny6fw==",
       "dev": true
     },
+    "union-value": {
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/union-value/-/union-value-1.0.1.tgz",
+      "integrity": "sha512-tJfXmxMeWYnczCVs7XAEvIV7ieppALdyepWMkHkwciRpZraG/xwT+s2JN8+pr1+8jCRf80FFzvr+MpQeeoF4Xg==",
+      "dev": true,
+      "requires": {
+        "arr-union": "^3.1.0",
+        "get-value": "^2.0.6",
+        "is-extendable": "^0.1.1",
+        "set-value": "^2.0.1"
+      }
+    },
+    "unique-string": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/unique-string/-/unique-string-1.0.0.tgz",
+      "integrity": "sha1-nhBXzKhRq7kzmPizOuGHuZyuwRo=",
+      "dev": true,
+      "requires": {
+        "crypto-random-string": "^1.0.0"
+      }
+    },
+    "unset-value": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/unset-value/-/unset-value-1.0.0.tgz",
+      "integrity": "sha1-g3aHP30jNRef+x5vw6jtDfyKtVk=",
+      "dev": true,
+      "requires": {
+        "has-value": "^0.3.1",
+        "isobject": "^3.0.0"
+      },
+      "dependencies": {
+        "has-value": {
+          "version": "0.3.1",
+          "resolved": "https://registry.npmjs.org/has-value/-/has-value-0.3.1.tgz",
+          "integrity": "sha1-ex9YutpiyoJ+wKIHgCVlSEWZXh8=",
+          "dev": true,
+          "requires": {
+            "get-value": "^2.0.3",
+            "has-values": "^0.1.4",
+            "isobject": "^2.0.0"
+          },
+          "dependencies": {
+            "isobject": {
+              "version": "2.1.0",
+              "resolved": "https://registry.npmjs.org/isobject/-/isobject-2.1.0.tgz",
+              "integrity": "sha1-8GVWEJaj8dou9GJy+BXIQNh+DIk=",
+              "dev": true,
+              "requires": {
+                "isarray": "1.0.0"
+              }
+            }
+          }
+        },
+        "has-values": {
+          "version": "0.1.4",
+          "resolved": "https://registry.npmjs.org/has-values/-/has-values-0.1.4.tgz",
+          "integrity": "sha1-bWHeldkd/Km5oCCJrThL/49it3E=",
+          "dev": true
+        }
+      }
+    },
+    "unzip-response": {
+      "version": "2.0.1",
+      "resolved": "https://registry.npmjs.org/unzip-response/-/unzip-response-2.0.1.tgz",
+      "integrity": "sha1-0vD3N9FrBhXnKmk17QQhRXLVb5c=",
+      "dev": true
+    },
+    "update-notifier": {
+      "version": "2.5.0",
+      "resolved": "https://registry.npmjs.org/update-notifier/-/update-notifier-2.5.0.tgz",
+      "integrity": "sha512-gwMdhgJHGuj/+wHJJs9e6PcCszpxR1b236igrOkUofGhqJuG+amlIKwApH1IW1WWl7ovZxsX49lMBWLxSdm5Dw==",
+      "dev": true,
+      "requires": {
+        "boxen": "^1.2.1",
+        "chalk": "^2.0.1",
+        "configstore": "^3.0.0",
+        "import-lazy": "^2.1.0",
+        "is-ci": "^1.0.10",
+        "is-installed-globally": "^0.1.0",
+        "is-npm": "^1.0.0",
+        "latest-version": "^3.0.0",
+        "semver-diff": "^2.0.0",
+        "xdg-basedir": "^3.0.0"
+      }
+    },
     "uri-js": {
       "version": "4.2.2",
       "resolved": "https://registry.npmjs.org/uri-js/-/uri-js-4.2.2.tgz",
@@ -2074,6 +4107,27 @@
         "punycode": "^2.1.0"
       }
     },
+    "urix": {
+      "version": "0.1.0",
+      "resolved": "https://registry.npmjs.org/urix/-/urix-0.1.0.tgz",
+      "integrity": "sha1-2pN/emLiH+wf0Y1Js1wpNQZ6bHI=",
+      "dev": true
+    },
+    "url-parse-lax": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/url-parse-lax/-/url-parse-lax-1.0.0.tgz",
+      "integrity": "sha1-evjzA2Rem9eaJy56FKxovAYJ2nM=",
+      "dev": true,
+      "requires": {
+        "prepend-http": "^1.0.1"
+      }
+    },
+    "use": {
+      "version": "3.1.1",
+      "resolved": "https://registry.npmjs.org/use/-/use-3.1.1.tgz",
+      "integrity": "sha512-cwESVXlO3url9YWlFW/TA9cshCEhtu7IKJ/p5soJ/gGpj7vbvFrAY/eIioQ6Dw23KjZhYgiIo8HOs1nQ2vr/oQ==",
+      "dev": true
+    },
     "validate-npm-package-license": {
       "version": "3.0.4",
       "resolved": "https://registry.npmjs.org/validate-npm-package-license/-/validate-npm-package-license-3.0.4.tgz",
@@ -2108,6 +4162,15 @@
         "string-width": "^1.0.2 || 2"
       }
     },
+    "widest-line": {
+      "version": "2.0.1",
+      "resolved": "https://registry.npmjs.org/widest-line/-/widest-line-2.0.1.tgz",
+      "integrity": "sha512-Ba5m9/Fa4Xt9eb2ELXt77JxVDV8w7qQrH0zS/TWSJdLyAwQjWoOzpzj5lwVftDz6n/EOu3tNACS84v509qwnJA==",
+      "dev": true,
+      "requires": {
+        "string-width": "^2.1.1"
+      }
+    },
     "wordwrap": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/wordwrap/-/wordwrap-1.0.0.tgz",
@@ -2176,12 +4239,35 @@
         "mkdirp": "^0.5.1"
       }
     },
+    "write-file-atomic": {
+      "version": "2.4.3",
+      "resolved": "https://registry.npmjs.org/write-file-atomic/-/write-file-atomic-2.4.3.tgz",
+      "integrity": "sha512-GaETH5wwsX+GcnzhPgKcKjJ6M2Cq3/iZp1WyY/X1CSqrW+jVNM9Y7D8EC2sM4ZG/V8wZlSniJnCKWPmBYAucRQ==",
+      "dev": true,
+      "requires": {
+        "graceful-fs": "^4.1.11",
+        "imurmurhash": "^0.1.4",
+        "signal-exit": "^3.0.2"
+      }
+    },
+    "xdg-basedir": {
+      "version": "3.0.0",
+      "resolved": "https://registry.npmjs.org/xdg-basedir/-/xdg-basedir-3.0.0.tgz",
+      "integrity": "sha1-SWsswQnsqNus/i3HK2A8F8WHCtQ=",
+      "dev": true
+    },
     "y18n": {
       "version": "4.0.0",
       "resolved": "https://registry.npmjs.org/y18n/-/y18n-4.0.0.tgz",
       "integrity": "sha512-r9S/ZyXu/Xu9q1tYlpsLIsa3EeLXXk0VwlxqTcFRfg9EhMW+17kbt9G0NrgCmhGb5vT2hyhJZLfDGx+7+5Uj/w==",
       "dev": true
     },
+    "yallist": {
+      "version": "2.1.2",
+      "resolved": "https://registry.npmjs.org/yallist/-/yallist-2.1.2.tgz",
+      "integrity": "sha1-HBH5IY8HYImkfdUS+TxmmaaoHVI=",
+      "dev": true
+    },
     "yargs": {
       "version": "13.2.2",
       "resolved": "https://registry.npmjs.org/yargs/-/yargs-13.2.2.tgz",
diff --git a/package.json b/package.json
index 9143de5..c4e7a40 100644
--- a/package.json
+++ b/package.json
@@ -5,10 +5,12 @@
   "main": "dist/mock-xmlhttprequest.common.js",
   "module": "dist/mock-xmlhttprequest.esm.js",
   "unpkg": "dist/mock-xmlhttprequest.js",
-  "typings": "types/index.d.ts",
+  "types": "types/index.d.ts",
   "files": [
     "dist/**/*",
-    "types/*.d.ts"
+    "types/index.d.ts",
+    "types/MockXhr.d.ts",
+    "types/MockXhrServer.d.ts"
   ],
   "scripts": {
     "dev:dist": "rollup -wm -c build/rollup.dev.config.js",
@@ -16,7 +18,7 @@
     "lint": "eslint src test",
     "test": "npm run test:unit && npm run test:types",
     "test:unit": "mocha test --recursive --require esm",
-    "test:types": "tsc -p types/test",
+    "test:types": "tsd",
     "posttest": "npm run lint",
     "prepare": "npm run build",
     "prepublishOnly": "npm run test"
@@ -50,10 +52,21 @@
     "rollup": "^1.16.4",
     "rollup-plugin-buble": "^0.19.8",
     "rollup-plugin-replace": "^2.2.0",
+    "typescript": "^3.5.3",
     "terser": "^4.0.2",
-    "typescript": "^3.4.5"
+    "tsd": "^0.7.4"
   },
   "engines": {
     "node": ">=6.0.0"
+  },
+  "tsd": {
+    "directory": "types/test",
+    "compilerOptions": {
+      "module": "es2015",
+      "target": "es5",
+      "lib": [
+        "dom"
+      ]
+    }
   }
 }
diff --git a/types/MockXhr.d.ts b/types/MockXhr.d.ts
index 0dffdc0..99a50bb 100644
--- a/types/MockXhr.d.ts
+++ b/types/MockXhr.d.ts
@@ -1,6 +1,4 @@
-export class MockXhr {
-  constructor();
-
+export default class MockXhr {
   /**
    * Set the request method and url.
    * https://xhr.spec.whatwg.org/#the-open()-method
@@ -113,9 +111,9 @@ export class MockXhr {
   // Global flag to enable the effects of the timeout attribute
   static timeoutEnabled: boolean;
 
-  static DONE: number;
-  static HEADERS_RECEIVED: number;
-  static LOADING: number;
-  static OPENED: number;
-  static UNSENT: number;
+  static UNSENT: 0
+  static OPENED: 1
+  static HEADERS_RECEIVED: 2
+  static LOADING: 3
+  static DONE: 4
 }
diff --git a/types/MockXhrServer.d.ts b/types/MockXhrServer.d.ts
index 98ae8a5..04ea091 100644
--- a/types/MockXhrServer.d.ts
+++ b/types/MockXhrServer.d.ts
@@ -1,3 +1,5 @@
+import MockXhr from "./MockXhr"
+
 export class MockXhrServer {
   /**
    * Constructor
@@ -13,7 +15,7 @@ export class MockXhrServer {
    * @param context context object (e.g. global, window)
    * @returns this
    */
-  install(context: object): MockXhrServer;
+  install(context: object): this;
 
   /**
    * Remove the server as the global XMLHttpRequest mock. Reverts the actions of install(global).
@@ -38,9 +40,9 @@ export class MockXhrServer {
    * @returns this
    */
   get(
-    matcher: string | RegExp | Function,
-    handler: object | Function | object[] | Function[],
-  ): MockXhrServer;
+    matcher: MockXhrServer.UrlMatcher,
+    handler: MockXhrServer.Handler
+  ): this;
 
   /**
    * Add a POST request handler.
@@ -50,9 +52,9 @@ export class MockXhrServer {
    * @returns this
    */
   post(
-    matcher: string | RegExp | Function,
-    handler: object | Function | object[] | Function[],
-  ): MockXhrServer;
+    matcher: MockXhrServer.UrlMatcher,
+    handler: MockXhrServer.Handler
+  ): this;
 
   /**
    * Add a PUT request handler.
@@ -62,9 +64,9 @@ export class MockXhrServer {
    * @returns this
    */
   put(
-    matcher: string | RegExp | Function,
-    handler: object | Function | object[] | Function[],
-  ): MockXhrServer;
+    matcher: MockXhrServer.UrlMatcher,
+    handler: MockXhrServer.Handler
+  ): this;
 
   /**
    * Add a DELETE request handler.
@@ -74,9 +76,9 @@ export class MockXhrServer {
    * @returns this
    */
   delete(
-    matcher: string | RegExp | Function,
-    handler: object | Function | object[] | Function[],
-  ): MockXhrServer;
+    matcher: MockXhrServer.UrlMatcher,
+    handler: MockXhrServer.Handler
+  ): this;
 
   /**
    * Add a request handler.
@@ -88,9 +90,9 @@ export class MockXhrServer {
    */
   addHandler(
     method: string,
-    matcher: string | RegExp | Function,
-    handler: object | Function | object[] | Function[],
-  ): MockXhrServer;
+    matcher: MockXhrServer.UrlMatcher,
+    handler: MockXhrServer.Handler
+  ): this;
 
   /**
    * Set the default request handler for requests that don't match any route.
@@ -98,17 +100,50 @@ export class MockXhrServer {
    * @param {object|Function|object[]|Function[]} handler request handler
    * @returns this
    */
-  setDefaultHandler(handler: object | Function | object[] | Function[]): MockXhrServer;
+  setDefaultHandler(handler: MockXhrServer.Handler): this;
 
   /**
    * Return 404 responses for requests that don't match any route.
    *
    * @returns this
    */
-  setDefault404(): MockXhrServer;
+  setDefault404(): this;
 
   /**
    * @returns list of requests received by the server. Entries: { method, url }
    */
-  getRequestLog(): object[];
+  getRequestLog(): MockXhrServer.RequestLog;
 }
+
+export namespace MockXhrServer {
+  type UrlMatcher =
+    ((url: string) => boolean)
+    | string
+    | RegExp
+
+  interface MockResponseHandler {
+    status: number;
+    statusText: string;
+    headers: Record<string, string>;
+    body: string;
+  }
+
+  interface MockCallbackHandler {
+    (xhr: MockXhr): void
+  }
+
+  type Handler =
+    (Partial<MockResponseHandler> | MockCallbackHandler)
+    | (Partial<MockResponseHandler> | MockCallbackHandler)[]
+
+  interface RequestLogEntry {
+    method: string;
+    url: string;
+    headers: Record<string, string>;
+    body?: any
+  }
+
+  type RequestLog = ReadonlyArray<RequestLogEntry>
+}
+
+export default MockXhrServer
diff --git a/types/index.d.ts b/types/index.d.ts
index 2fde886..396827f 100644
--- a/types/index.d.ts
+++ b/types/index.d.ts
@@ -1,5 +1,5 @@
-import './MockXhr';
-import './MockXhrServer';
+import MockXhr from "./MockXhr"
+import MockXhrServer from "./MockXhrServer"
 
 /**
  * Create a new "local" MockXhr subclass. This makes it easier to have self-contained unit tests
@@ -8,11 +8,18 @@ import './MockXhrServer';
  *
  * @returns new MockXhr subclass
  */
-export function newMockXhr(): MockXhr;
+declare function newMockXhr(): MockXhr;
 
 /**
  * Create a new mock server using MockXhr.
  *
  * @returns new mock server
  */
-export function newServer(routes: any): MockXhrServer;
+declare function newServer(routes: any): MockXhrServer;
+
+export {
+  MockXhr,
+  MockXhrServer,
+  newServer,
+  newMockXhr
+}
diff --git a/types/test/MockXhrServer.test-d.ts b/types/test/MockXhrServer.test-d.ts
new file mode 100644
index 0000000..584f80e
--- /dev/null
+++ b/types/test/MockXhrServer.test-d.ts
@@ -0,0 +1,9 @@
+import { expectError, expectType } from 'tsd'
+import MockXhrServer from '../MockXhrServer'
+
+expectType<MockXhrServer.UrlMatcher>('http://foo/bar.com')
+expectType<MockXhrServer.UrlMatcher>(/http:/)
+expectType<MockXhrServer.UrlMatcher>((url: string) => url === 'http://foo/bar.com')
+
+expectError<MockXhrServer.UrlMatcher>((url: string) => url)
+expectError<MockXhrServer.UrlMatcher>(true)
diff --git a/types/test/XMLHttpRequest-compat.test-d.ts b/types/test/XMLHttpRequest-compat.test-d.ts
new file mode 100644
index 0000000..41b3d75
--- /dev/null
+++ b/types/test/XMLHttpRequest-compat.test-d.ts
@@ -0,0 +1,7 @@
+import { expectError } from 'tsd'
+import { newMockXhr } from '../'
+
+const xhr = newMockXhr()
+
+//can be used to validate structural compliance with XMLHttpRequest interface
+expectError<XMLHttpRequest>(xhr) //not yet compatible
diff --git a/types/test/index.test-d.ts b/types/test/index.test-d.ts
new file mode 100644
index 0000000..39837d8
--- /dev/null
+++ b/types/test/index.test-d.ts
@@ -0,0 +1,5 @@
+import { expectType } from 'tsd'
+import { MockXhr, MockXhrServer, newMockXhr, newServer } from '../'
+
+expectType<MockXhr>(newMockXhr())
+expectType<MockXhrServer>(newServer(newMockXhr()))
diff --git a/types/test/index.ts b/types/test/index.ts
deleted file mode 100644
index 4cb6318..0000000
--- a/types/test/index.ts
+++ /dev/null
@@ -1 +0,0 @@
-import * MockXMLHttpRequest from 'mock-xmlhttprequest';
diff --git a/types/test/tsconfig.json b/types/test/tsconfig.json
deleted file mode 100644
index 8434919..0000000
--- a/types/test/tsconfig.json
+++ /dev/null
@@ -1,16 +0,0 @@
-{
-  "compilerOptions": {
-    "target": "es5",
-    "module": "es2015",
-    "moduleResolution": "node",
-    "lib": [
-      "es5",
-    ],
-    "strict": true,
-    "noEmit": true
-  },
-  "include": [
-    "*.ts",
-    "../*.d.ts"
-  ]
-}