diff --git a/package.json b/package.json
index 8ad068a..4896931 100644
--- a/package.json
+++ b/package.json
@@ -63,6 +63,7 @@
     "esdoc-standard-plugin": "1.0.0",
     "fixpack": "4.0.0",
     "np": "7.4.0",
+    "power-assert": "1.6.1",
     "regenerator-runtime": "0.13.7",
     "xo": "0.38.2"
   },
diff --git a/yarn.lock b/yarn.lock
index 8913c1e..1f15094 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1176,6 +1176,11 @@ abab@^1.0.0:
   resolved "https://registry.yarnpkg.com/abab/-/abab-1.0.4.tgz#5faad9c2c07f60dd76770f71cf025b62a63cfd4e"
   integrity sha1-X6rZwsB/YN12dw9xzwJbYqY8/U4=
 
+acorn-es7-plugin@^1.0.12:
+  version "1.1.7"
+  resolved "https://registry.yarnpkg.com/acorn-es7-plugin/-/acorn-es7-plugin-1.1.7.tgz#f2ee1f3228a90eead1245f9ab1922eb2e71d336b"
+  integrity sha1-8u4fMiipDurRJF+asZIusucdM2s=
+
 acorn-globals@^1.0.4:
   version "1.0.9"
   resolved "https://registry.yarnpkg.com/acorn-globals/-/acorn-globals-1.0.9.tgz#55bb5e98691507b74579d0513413217c380c54cf"
@@ -1198,6 +1203,11 @@ acorn@^2.1.0, acorn@^2.4.0:
   resolved "https://registry.yarnpkg.com/acorn/-/acorn-2.7.0.tgz#ab6e7d9d886aaca8b085bc3312b79a198433f0e7"
   integrity sha1-q259nYhqrKiwhbwzEreaGYQz8Oc=
 
+acorn@^5.0.0:
+  version "5.7.4"
+  resolved "https://registry.yarnpkg.com/acorn/-/acorn-5.7.4.tgz#3e8d8a9947d0599a1796d10225d7432f4a4acf5e"
+  integrity sha512-1D++VG7BhrtvQpNbBzovKNc1FLGGEE/oGe7b9xJm/RFHMBeUaUGpluV9RLjZa47YFdPcDAenEYuq9pQPcMdLJg==
+
 acorn@^7.4.0:
   version "7.4.1"
   resolved "https://registry.yarnpkg.com/acorn/-/acorn-7.4.1.tgz#feaed255973d2e77555b83dbc08851a6c63520fa"
@@ -1360,6 +1370,11 @@ arr-union@^3.1.0:
   resolved "https://registry.yarnpkg.com/arr-union/-/arr-union-3.1.0.tgz#e39b09aea9def866a8f206e288af63919bae39c4"
   integrity sha1-45sJrqne+Gao8gbiiK9jkZuuOcQ=
 
+array-filter@^1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/array-filter/-/array-filter-1.0.0.tgz#baf79e62e6ef4c2a4c0b831232daffec251f9d83"
+  integrity sha1-uveeYubvTCpMC4MSMtr/7CUfnYM=
+
 array-find-index@^1.0.1:
   version "1.0.2"
   resolved "https://registry.yarnpkg.com/array-find-index/-/array-find-index-1.0.2.tgz#df010aa1287e164bbda6f9723b0a96a1ec4187a1"
@@ -1999,6 +2014,11 @@ call-me-maybe@^1.0.1:
   resolved "https://registry.yarnpkg.com/call-me-maybe/-/call-me-maybe-1.0.1.tgz#26d208ea89e37b5cbde60250a15f031c16a4d66b"
   integrity sha1-JtII6onje1y95gJQoV8DHBak1ms=
 
+call-signature@0.0.2:
+  version "0.0.2"
+  resolved "https://registry.yarnpkg.com/call-signature/-/call-signature-0.0.2.tgz#a84abc825a55ef4cb2b028bd74e205a65b9a4996"
+  integrity sha1-qEq8glpV70yysCi9dOIFpluaSZY=
+
 callsites@^3.0.0, callsites@^3.1.0:
   version "3.1.0"
   resolved "https://registry.yarnpkg.com/callsites/-/callsites-3.1.0.tgz#b3630abd8943432f54b3f0519238e33cd7df2f73"
@@ -2427,7 +2447,7 @@ core-js-compat@^3.8.1, core-js-compat@^3.9.0:
     browserslist "^4.16.3"
     semver "7.0.0"
 
-core-js@^2.4.0:
+core-js@^2.0.0, core-js@^2.4.0:
   version "2.6.12"
   resolved "https://registry.yarnpkg.com/core-js/-/core-js-2.6.12.tgz#d9333dfa7b065e347cc5682219d6f690859cc2ec"
   integrity sha512-Kb2wC0fvsWfQrgk8HU5lW6U/Lcs8+9aaYcy4ZFc6DDlo4nZ7n70dEgE5rtR0oG6ufKDUnrwfWL1mXR5ljDatrQ==
@@ -2654,7 +2674,7 @@ defer-to-connect@^2.0.0:
   resolved "https://registry.yarnpkg.com/defer-to-connect/-/defer-to-connect-2.0.1.tgz#8016bdb4143e4632b77a3449c6236277de520587"
   integrity sha512-4tvttepXG1VaYGrRibk5EwJd1t4udunSOVMdLSAL6mId1ix438oPwPZMALY41FCijukO1L0twNcGsdzS7dHgDg==
 
-define-properties@^1.1.3:
+define-properties@^1.1.2, define-properties@^1.1.3:
   version "1.1.3"
   resolved "https://registry.yarnpkg.com/define-properties/-/define-properties-1.1.3.tgz#cf88da6cbee26fe6db7094f61d870cbd84cee9f1"
   integrity sha512-3MqfYKj2lLzdMSf8ZIZE/V+Zuy+BgD6f164e8K2w7dgnpKArBDerGYpM46IYYcjnkdPNMjPk9A6VFB8+3SKlXQ==
@@ -2736,6 +2756,11 @@ detect-newline@^3.1.0:
   resolved "https://registry.yarnpkg.com/detect-newline/-/detect-newline-3.1.0.tgz#576f5dfc63ae1a192ff192d8ad3af6308991b651"
   integrity sha512-TLz+x/vEXm/Y7P7wn1EJFNLxYpUD4TgMosxY6fAVJUnJMbupHBOncxyWUG9OpTaH9EBD7uFI5LfEgmMOc54DsA==
 
+diff-match-patch@^1.0.0:
+  version "1.0.5"
+  resolved "https://registry.yarnpkg.com/diff-match-patch/-/diff-match-patch-1.0.5.tgz#abb584d5f10cd1196dfc55aa03701592ae3f7b37"
+  integrity sha512-IayShXAgj/QMXgB0IWmKx+rOPuGMhqm5w6jvFxmVenXKIzRqTAAsbBPT3kWQeGANj3jGgvcvv4yK6SxqYmikgw==
+
 diffie-hellman@^5.0.0:
   version "5.0.3"
   resolved "https://registry.yarnpkg.com/diffie-hellman/-/diffie-hellman-5.0.3.tgz#40e8ee98f55a2149607146921c63e1ae5f3d2875"
@@ -2854,6 +2879,11 @@ duplexer3@^0.1.4:
   resolved "https://registry.yarnpkg.com/duplexer3/-/duplexer3-0.1.4.tgz#ee01dd1cac0ed3cbc7fdbea37dc0a8f1ce002ce2"
   integrity sha1-7gHdHKwO08vH/b6jfcCo8c4ALOI=
 
+eastasianwidth@^0.2.0:
+  version "0.2.0"
+  resolved "https://registry.yarnpkg.com/eastasianwidth/-/eastasianwidth-0.2.0.tgz#696ce2ec0aa0e6ea93a397ffcf24aa7840c827cb"
+  integrity sha512-I88TYZWc9XiYHRQ4/3c5rjjfgkjhLyW2luGIheGERbNQ6OY7yTybanSpDXZa8y7VUP9YmDcYa+eyq4ca7iLqWA==
+
 ecc-jsbn@~0.1.1:
   version "0.1.2"
   resolved "https://registry.yarnpkg.com/ecc-jsbn/-/ecc-jsbn-0.1.2.tgz#3a83a904e54353287874c564b7549386849a98c9"
@@ -2900,6 +2930,22 @@ emoji-regex@^8.0.0:
   resolved "https://registry.yarnpkg.com/emoji-regex/-/emoji-regex-8.0.0.tgz#e818fd69ce5ccfcb404594f842963bf53164cc37"
   integrity sha512-MSjYzcWNOA0ewAHpz0MxpYFvwg6yjy1NG3xteoqz644VCo/RPgnr1/GGt+ic3iJTzQ8Eu3TdM14SawnVUmGE6A==
 
+empower-core@^1.2.0:
+  version "1.2.0"
+  resolved "https://registry.yarnpkg.com/empower-core/-/empower-core-1.2.0.tgz#ce3fb2484d5187fa29c23fba8344b0b2fdf5601c"
+  integrity sha512-g6+K6Geyc1o6FdXs9HwrXleCFan7d66G5xSCfSF7x1mJDCes6t0om9lFQG3zOrzh3Bkb/45N0cZ5Gqsf7YrzGQ==
+  dependencies:
+    call-signature "0.0.2"
+    core-js "^2.0.0"
+
+empower@^1.3.1:
+  version "1.3.1"
+  resolved "https://registry.yarnpkg.com/empower/-/empower-1.3.1.tgz#768979cbbb36d71d8f5edaab663deacb9dab916c"
+  integrity sha512-uB6/ViBaawOO/uujFADTK3SqdYlxYNn+N4usK9MRKZ4Hbn/1QSy8k2PezxCA2/+JGbF8vd/eOfghZ90oOSDZCA==
+  dependencies:
+    core-js "^2.0.0"
+    empower-core "^1.2.0"
+
 end-of-stream@^1.1.0:
   version "1.4.4"
   resolved "https://registry.yarnpkg.com/end-of-stream/-/end-of-stream-1.4.4.tgz#5ae64a5f45057baf3626ec14da0ca5e4b2431eb0"
@@ -3433,6 +3479,13 @@ esprima@^4.0.0, esprima@^4.0.1:
   resolved "https://registry.yarnpkg.com/esprima/-/esprima-4.0.1.tgz#13b04cdb3e6c5d19df91ab6987a8695619b0aa71"
   integrity sha512-eGuFFw7Upda+g4p+QHvnW0RyTX/SVeJBDM/gCtMARO0cLuT2HcEKnTPvhjV6aGeqrCB/sbNop0Kszm0jsaWU4A==
 
+espurify@^1.6.0:
+  version "1.8.1"
+  resolved "https://registry.yarnpkg.com/espurify/-/espurify-1.8.1.tgz#5746c6c1ab42d302de10bd1d5bf7f0e8c0515056"
+  integrity sha512-ZDko6eY/o+D/gHCWyHTU85mKDgYcS4FJj7S+YD6WIInm7GQ6AnOjmcL4+buFV/JOztVLELi/7MmuGU5NHta0Mg==
+  dependencies:
+    core-js "^2.0.0"
+
 espurify@^2.0.1:
   version "2.0.1"
   resolved "https://registry.yarnpkg.com/espurify/-/espurify-2.0.1.tgz#c25b3bb613863daa142edcca052370a1a459f41d"
@@ -3457,7 +3510,7 @@ estraverse@^1.5.0:
   resolved "https://registry.yarnpkg.com/estraverse/-/estraverse-1.9.3.tgz#af67f2dc922582415950926091a4005d29c9bb44"
   integrity sha1-r2fy3JIlgkFZUJJgkaQAXSnJu0Q=
 
-estraverse@^4.1.1, estraverse@^4.2.0:
+estraverse@^4.1.0, estraverse@^4.1.1, estraverse@^4.2.0:
   version "4.3.0"
   resolved "https://registry.yarnpkg.com/estraverse/-/estraverse-4.3.0.tgz#398ad3f3c5a24948be7725e83d11a7de28cdbd1d"
   integrity sha512-39nnKffWz8xN1BU/2c79n9nB9HDzo0niYUqx6xyqUnyoAnQyyWpOTdZEeiCch8BBu515t4wp9ZmgVfVhn9EBpw==
@@ -4311,6 +4364,11 @@ indent-string@^4.0.0:
   resolved "https://registry.yarnpkg.com/indent-string/-/indent-string-4.0.0.tgz#624f8f4497d619b2d9768531d58f4122854d7251"
   integrity sha512-EdDDZu4A2OyIK7Lr/2zG+w5jmbuk1DVBnEwREQvBzspBJkCEbRa8GxU1lghYcaGJCnRWibjDXlq779X1/y5xwg==
 
+indexof@0.0.1:
+  version "0.0.1"
+  resolved "https://registry.yarnpkg.com/indexof/-/indexof-0.0.1.tgz#82dc336d232b9062179d05ab3293a66059fd435d"
+  integrity sha1-gtwzbSMrkGIXnQWrMpOmYFn9Q10=
+
 inflight@^1.0.4:
   version "1.0.6"
   resolved "https://registry.yarnpkg.com/inflight/-/inflight-1.0.6.tgz#49bd6331d7d02d0c09bc910a1075ba8165b56df9"
@@ -5855,7 +5913,7 @@ object-inspect@^1.9.0:
   resolved "https://registry.yarnpkg.com/object-inspect/-/object-inspect-1.9.0.tgz#c90521d74e1127b67266ded3394ad6116986533a"
   integrity sha512-i3Bp9iTqwhaLZBxGkRfo5ZbE07BQRT7MGu8+nNgwW9ItGp1TzCTw2DLEoWwjClxBjOFI/hWljTAmYGCEwmtnOw==
 
-object-keys@^1.0.12, object-keys@^1.1.1:
+object-keys@^1.0.0, object-keys@^1.0.12, object-keys@^1.1.1:
   version "1.1.1"
   resolved "https://registry.yarnpkg.com/object-keys/-/object-keys-1.1.1.tgz#1c47f272df277f3b1daf061677d9c82e2322c60e"
   integrity sha512-NuAESUOUMrlIXOfHKzD6bpPu3tYt3xvjNdRIQ+FeT0lNb4K8WR70CaDxhuNguS2XG+GjkyMwOzsN5ZktImfhLA==
@@ -6358,6 +6416,105 @@ posix-character-classes@^0.1.0:
   resolved "https://registry.yarnpkg.com/posix-character-classes/-/posix-character-classes-0.1.1.tgz#01eac0fe3b5af71a2a6c02feabb8c1fef7e00eab"
   integrity sha1-AerA/jta9xoqbAL+q7jB/vfgDqs=
 
+power-assert-context-formatter@^1.0.7:
+  version "1.2.0"
+  resolved "https://registry.yarnpkg.com/power-assert-context-formatter/-/power-assert-context-formatter-1.2.0.tgz#8fbe72692288ec5a7203cdf215c8b838a6061d2a"
+  integrity sha512-HLNEW8Bin+BFCpk/zbyKwkEu9W8/zThIStxGo7weYcFkKgMuGCHUJhvJeBGXDZf0Qm2xis4pbnnciGZiX0EpSg==
+  dependencies:
+    core-js "^2.0.0"
+    power-assert-context-traversal "^1.2.0"
+
+power-assert-context-reducer-ast@^1.0.7:
+  version "1.2.0"
+  resolved "https://registry.yarnpkg.com/power-assert-context-reducer-ast/-/power-assert-context-reducer-ast-1.2.0.tgz#c7ca1c9e39a6fb717f7ac5fe9e76e192bf525df3"
+  integrity sha512-EgOxmZ/Lb7tw4EwSKX7ZnfC0P/qRZFEG28dx/690qvhmOJ6hgThYFm5TUWANDLK5NiNKlPBi5WekVGd2+5wPrw==
+  dependencies:
+    acorn "^5.0.0"
+    acorn-es7-plugin "^1.0.12"
+    core-js "^2.0.0"
+    espurify "^1.6.0"
+    estraverse "^4.2.0"
+
+power-assert-context-traversal@^1.2.0:
+  version "1.2.0"
+  resolved "https://registry.yarnpkg.com/power-assert-context-traversal/-/power-assert-context-traversal-1.2.0.tgz#f6e71454baf640de5c1c9c270349f5c9ab0b2e94"
+  integrity sha512-NFoHU6g2umNajiP2l4qb0BRWD773Aw9uWdWYH9EQsVwIZnog5bd2YYLFCVvaxWpwNzWeEfZIon2xtyc63026pQ==
+  dependencies:
+    core-js "^2.0.0"
+    estraverse "^4.1.0"
+
+power-assert-formatter@^1.4.1:
+  version "1.4.1"
+  resolved "https://registry.yarnpkg.com/power-assert-formatter/-/power-assert-formatter-1.4.1.tgz#5dc125ed50a3dfb1dda26c19347f3bf58ec2884a"
+  integrity sha1-XcEl7VCj37HdomwZNH879Y7CiEo=
+  dependencies:
+    core-js "^2.0.0"
+    power-assert-context-formatter "^1.0.7"
+    power-assert-context-reducer-ast "^1.0.7"
+    power-assert-renderer-assertion "^1.0.7"
+    power-assert-renderer-comparison "^1.0.7"
+    power-assert-renderer-diagram "^1.0.7"
+    power-assert-renderer-file "^1.0.7"
+
+power-assert-renderer-assertion@^1.0.7:
+  version "1.2.0"
+  resolved "https://registry.yarnpkg.com/power-assert-renderer-assertion/-/power-assert-renderer-assertion-1.2.0.tgz#3db6ffcda106b37bc1e06432ad0d748a682b147a"
+  integrity sha512-3F7Q1ZLmV2ZCQv7aV7NJLNK9G7QsostrhOU7U0RhEQS/0vhEqrRg2jEJl1jtUL4ZyL2dXUlaaqrmPv5r9kRvIg==
+  dependencies:
+    power-assert-renderer-base "^1.1.1"
+    power-assert-util-string-width "^1.2.0"
+
+power-assert-renderer-base@^1.1.1:
+  version "1.1.1"
+  resolved "https://registry.yarnpkg.com/power-assert-renderer-base/-/power-assert-renderer-base-1.1.1.tgz#96a650c6fd05ee1bc1f66b54ad61442c8b3f63eb"
+  integrity sha1-lqZQxv0F7hvB9mtUrWFELIs/Y+s=
+
+power-assert-renderer-comparison@^1.0.7:
+  version "1.2.0"
+  resolved "https://registry.yarnpkg.com/power-assert-renderer-comparison/-/power-assert-renderer-comparison-1.2.0.tgz#e4f88113225a69be8aa586ead05aef99462c0495"
+  integrity sha512-7c3RKPDBKK4E3JqdPtYRE9cM8AyX4LC4yfTvvTYyx8zSqmT5kJnXwzR0yWQLOavACllZfwrAGQzFiXPc5sWa+g==
+  dependencies:
+    core-js "^2.0.0"
+    diff-match-patch "^1.0.0"
+    power-assert-renderer-base "^1.1.1"
+    stringifier "^1.3.0"
+    type-name "^2.0.1"
+
+power-assert-renderer-diagram@^1.0.7:
+  version "1.2.0"
+  resolved "https://registry.yarnpkg.com/power-assert-renderer-diagram/-/power-assert-renderer-diagram-1.2.0.tgz#37f66e8542e5677c5b58e6d72b01c0d9a30e2219"
+  integrity sha512-JZ6PC+DJPQqfU6dwSmpcoD7gNnb/5U77bU5KgNwPPa+i1Pxiz6UuDeM3EUBlhZ1HvH9tMjI60anqVyi5l2oNdg==
+  dependencies:
+    core-js "^2.0.0"
+    power-assert-renderer-base "^1.1.1"
+    power-assert-util-string-width "^1.2.0"
+    stringifier "^1.3.0"
+
+power-assert-renderer-file@^1.0.7:
+  version "1.2.0"
+  resolved "https://registry.yarnpkg.com/power-assert-renderer-file/-/power-assert-renderer-file-1.2.0.tgz#3f4bebd9e1455d75cf2ac541e7bb515a87d4ce4b"
+  integrity sha512-/oaVrRbeOtGoyyd7e4IdLP/jIIUFJdqJtsYzP9/88R39CMnfF/S/rUc8ZQalENfUfQ/wQHu+XZYRMaCEZmEesg==
+  dependencies:
+    power-assert-renderer-base "^1.1.1"
+
+power-assert-util-string-width@^1.2.0:
+  version "1.2.0"
+  resolved "https://registry.yarnpkg.com/power-assert-util-string-width/-/power-assert-util-string-width-1.2.0.tgz#6e06d5e3581bb876c5d377c53109fffa95bd91a0"
+  integrity sha512-lX90G0igAW0iyORTILZ/QjZWsa1MZ6VVY3L0K86e2eKun3S4LKPH4xZIl8fdeMYLfOjkaszbNSzf1uugLeAm2A==
+  dependencies:
+    eastasianwidth "^0.2.0"
+
+power-assert@1.6.1:
+  version "1.6.1"
+  resolved "https://registry.yarnpkg.com/power-assert/-/power-assert-1.6.1.tgz#b28cbc02ae808afd1431d0cd5093a39ac5a5b1fe"
+  integrity sha512-VWkkZV6Y+W8qLX/PtJu2Ur2jDPIs0a5vbP0TpKeybNcIXmT4vcKoVkyTp5lnQvTpY/DxacAZ4RZisHRHLJcAZQ==
+  dependencies:
+    define-properties "^1.1.2"
+    empower "^1.3.1"
+    power-assert-formatter "^1.4.1"
+    universal-deep-strict-equal "^1.2.1"
+    xtend "^4.0.0"
+
 prelude-ls@^1.2.1:
   version "1.2.1"
   resolved "https://registry.yarnpkg.com/prelude-ls/-/prelude-ls-1.2.1.tgz#debc6489d7a6e6b0e7611888cec880337d316396"
@@ -7241,6 +7398,15 @@ string_decoder@~1.1.1:
   dependencies:
     safe-buffer "~5.1.0"
 
+stringifier@^1.3.0:
+  version "1.4.0"
+  resolved "https://registry.yarnpkg.com/stringifier/-/stringifier-1.4.0.tgz#d704581567f4526265d00ed8ecb354a02c3fec28"
+  integrity sha512-cNsMOqqrcbLcHTXEVmkw9y0fwDwkdgtZwlfyolzpQDoAE1xdNGhQhxBUfiDvvZIKl1hnUEgMv66nHwtMz3OjPw==
+  dependencies:
+    core-js "^2.0.0"
+    traverse "^0.6.6"
+    type-name "^2.0.1"
+
 strip-ansi@^3.0.0, strip-ansi@^3.0.1:
   version "3.0.1"
   resolved "https://registry.yarnpkg.com/strip-ansi/-/strip-ansi-3.0.1.tgz#6a385fb8853d952d5ff05d0e8aaf94278dc63dcf"
@@ -7503,6 +7669,11 @@ tr46@~0.0.1:
   resolved "https://registry.yarnpkg.com/tr46/-/tr46-0.0.3.tgz#8184fd347dac9cdc185992f3a6622e14b9d9ab6a"
   integrity sha1-gYT9NH2snNwYWZLzpmIuFLnZq2o=
 
+traverse@^0.6.6:
+  version "0.6.6"
+  resolved "https://registry.yarnpkg.com/traverse/-/traverse-0.6.6.tgz#cbdf560fd7b9af632502fed40f918c157ea97137"
+  integrity sha1-y99WD9e5r2MlAv7UD5GMFX6pcTc=
+
 trim-newlines@^3.0.0:
   version "3.0.0"
   resolved "https://registry.yarnpkg.com/trim-newlines/-/trim-newlines-3.0.0.tgz#79726304a6a898aa8373427298d54c2ee8b1cb30"
@@ -7616,6 +7787,11 @@ type-fest@^0.8.1:
   resolved "https://registry.yarnpkg.com/type-fest/-/type-fest-0.8.1.tgz#09e249ebde851d3b1e48d27c105444667f17b83d"
   integrity sha512-4dbzIzqvjtgiM5rw1k5rEHtBANKmdudhGyBEajN01fEyhaAIhsoKNy6y7+IN93IfpFtwY9iqi7kD+xwKhQsNJA==
 
+type-name@^2.0.1:
+  version "2.0.2"
+  resolved "https://registry.yarnpkg.com/type-name/-/type-name-2.0.2.tgz#efe7d4123d8ac52afff7f40c7e4dec5266008fb4"
+  integrity sha1-7+fUEj2KxSr/9/QMfk3sUmYAj7Q=
+
 typedarray-to-buffer@^3.1.5:
   version "3.1.5"
   resolved "https://registry.yarnpkg.com/typedarray-to-buffer/-/typedarray-to-buffer-3.1.5.tgz#a97ee7a9ff42691b9f783ff1bc5112fe3fca9080"
@@ -7683,6 +7859,15 @@ unique-string@^2.0.0:
   dependencies:
     crypto-random-string "^2.0.0"
 
+universal-deep-strict-equal@^1.2.1:
+  version "1.2.2"
+  resolved "https://registry.yarnpkg.com/universal-deep-strict-equal/-/universal-deep-strict-equal-1.2.2.tgz#0da4ac2f73cff7924c81fa4de018ca562ca2b0a7"
+  integrity sha1-DaSsL3PP95JMgfpN4BjKViyisKc=
+  dependencies:
+    array-filter "^1.0.0"
+    indexof "0.0.1"
+    object-keys "^1.0.0"
+
 universalify@^0.1.0:
   version "0.1.2"
   resolved "https://registry.yarnpkg.com/universalify/-/universalify-0.1.2.tgz#b646f69be3942dabcecc9d6639c80dc105efaa66"