Polyfill Symbol usage

package.json

@@ -101,7 +101,7 @@
     "crx": "^5.0.0",
     "css-loader": "^1.0.1",
     "error-stack-parser": "^2.0.2",
-    "es6-symbol": "3.0.2",
+    "es6-symbol": "^3",
     "escape-string-regexp": "^1.0.5",
     "eslint": "^4.19.1",
     "eslint-config-prettier": "^2.9.0",

packages/react-devtools-core/package.json

@@ -23,6 +23,7 @@
     "start:standalone": "cross-env NODE_ENV=development webpack --config webpack.standalone.js --watch"
   },
   "dependencies": {
+    "es6-symbol": "^3",
     "shell-quote": "^1.6.1",
     "ws": "^7"
   },

packages/react-devtools-inline/package.json

@@ -19,7 +19,9 @@
     "prepublish": "yarn run build",
     "start": "cross-env NODE_ENV=development webpack --config webpack.config.js --watch"
   },
-  "dependencies": {},
+  "dependencies": {
+    "es6-symbol": "^3"
+  },
   "devDependencies": {
     "cross-env": "^3.1.4"
   }

src/hydration.js

@@ -1,5 +1,6 @@
 // @flow
 
+import Symbol from 'es6-symbol';
 import {
   isElement,
   typeOf,

src/utils.js

@@ -1,5 +1,6 @@
 // @flow
 
+import Symbol from 'es6-symbol';
 import LRU from 'lru-cache';
 import {
   TREE_OPERATION_ADD,

yarn.lock

@@ -3859,12 +3859,6 @@ d@1:
   dependencies:
     es5-ext "^0.10.9"
 
-d@^0.1.1, d@~0.1.1:
-  version "0.1.1"
-  resolved "https://registry.yarnpkg.com/d/-/d-0.1.1.tgz#da184c535d18d8ee7ba2aa229b914009fae11309"
-  dependencies:
-    es5-ext "~0.10.2"
-
 damerau-levenshtein@^1.0.0:
   version "1.0.4"
   resolved "https://registry.yarnpkg.com/damerau-levenshtein/-/damerau-levenshtein-1.0.4.tgz#03191c432cb6eea168bb77f3a55ffdccb8978514"
@@ -4481,13 +4475,6 @@ es5-ext@^0.10.14, es5-ext@^0.10.35, es5-ext@^0.10.9, es5-ext@~0.10.14:
     es6-symbol "~3.1.1"
     next-tick "^1.0.0"
 
-es5-ext@^0.10.7, es5-ext@~0.10.10, es5-ext@~0.10.11, es5-ext@~0.10.2:
-  version "0.10.12"
-  resolved "https://registry.yarnpkg.com/es5-ext/-/es5-ext-0.10.12.tgz#aa84641d4db76b62abba5e45fd805ecbab140047"
-  dependencies:
-    es6-iterator "2"
-    es6-symbol "~3.1"
-
 [email protected]:
   version "4.0.0"
   resolved "https://registry.yarnpkg.com/es6-error/-/es6-error-4.0.0.tgz#f094c7041f662599bb12720da059d6b9c7ff0f40"
@@ -4498,14 +4485,6 @@ [email protected]:
   resolved "https://registry.yarnpkg.com/es6-error/-/es6-error-4.1.1.tgz#9e3af407459deed47e9a91f9b885a84eb05c561d"
   integrity sha512-Um/+FxMr9CISWh0bi5Zv0iOD+4cFh5qLeks1qhAopKVAJw3drgKbKySikp7wGhDL0HPeaja0P5ULZrxLkniUVg==
 
-es6-iterator@2:
-  version "2.0.0"
-  resolved "https://registry.yarnpkg.com/es6-iterator/-/es6-iterator-2.0.0.tgz#bd968567d61635e33c0b80727613c9cb4b096bac"
-  dependencies:
-    d "^0.1.1"
-    es5-ext "^0.10.7"
-    es6-symbol "3"
-
 es6-iterator@^2.0.1, es6-iterator@~2.0.1, es6-iterator@~2.0.3:
   version "2.0.3"
   resolved "https://registry.yarnpkg.com/es6-iterator/-/es6-iterator-2.0.3.tgz#a7de889141a05a94b0854403b2d0a0fbfa98f3b7"
@@ -4560,21 +4539,7 @@ es6-set@~0.1.5:
     es6-symbol "3.1.1"
     event-emitter "~0.3.5"
 
-es6-symbol@3, es6-symbol@~3.1:
-  version "3.1.0"
-  resolved "https://registry.yarnpkg.com/es6-symbol/-/es6-symbol-3.1.0.tgz#94481c655e7a7cad82eba832d97d5433496d7ffa"
-  dependencies:
-    d "~0.1.1"
-    es5-ext "~0.10.11"
-
-[email protected]:
-  version "3.0.2"
-  resolved "https://registry.yarnpkg.com/es6-symbol/-/es6-symbol-3.0.2.tgz#1e928878c6f5e63541625b4bb4df4af07d154219"
-  dependencies:
-    d "~0.1.1"
-    es5-ext "~0.10.10"
-
-[email protected], es6-symbol@^3.1.1, es6-symbol@~3.1.1:
+[email protected], es6-symbol@^3, es6-symbol@^3.1.1, es6-symbol@~3.1.1:
   version "3.1.1"
   resolved "https://registry.yarnpkg.com/es6-symbol/-/es6-symbol-3.1.1.tgz#bf00ef4fdab6ba1b46ecb7b629b4c7ed5715cc77"
   integrity sha1-vwDvT9q2uhtG7Le2KbTH7VcVzHc=