fix(deps): add downstream peer dependencies

Fixes iamturns#6 by adding downstream peer dependencies to this package (we add
the React specific dependencies as optional).

This also enables Yarn v2 support (which requires upstream packages to
include their dependency's peer dependencies).

package.json

@@ -28,7 +28,12 @@
     "eslint-config-airbnb-base": "^14.2.0"
   },
   "peerDependencies": {
-    "@typescript-eslint/eslint-plugin": "^3.6.1"
+    "@typescript-eslint/eslint-plugin": "^3.6.1",
+    "eslint": "^5.16.0 || ^6.8.0 || ^7.2.0",
+    "eslint-plugin-import": "^2.21.2",
+    "eslint-plugin-jsx-a11y": "^6.3.0",
+    "eslint-plugin-react": "^7.20.0",
+    "eslint-plugin-react-hooks": "^4 || ^3 || ^2.3.0 || ^1.7.0"
   },
   "devDependencies": {
     "@typescript-eslint/eslint-plugin": "3.6.1",
@@ -55,5 +60,16 @@
     "javascript",
     "styleguide",
     "typescript"
-  ]
+  ],
+  "peerDependenciesMeta": {
+    "eslint-plugin-jsx-a11y": {
+      "optional": true
+    },
+    "eslint-plugin-react": {
+      "optional": true
+    },
+    "eslint-plugin-react-hooks": {
+      "optional": true
+    }
+  }
 }