Remove @babel/polyfill in favor of core-js

package.json

@@ -37,13 +37,14 @@
   "homepage": "https://github.com/babel/broccoli-babel-transpiler",
   "dependencies": {
     "@babel/core": "^7.11.0",
-    "@babel/polyfill": "^7.10.4",
     "broccoli-persistent-filter": "^3.0.0",
     "clone": "^2.1.2",
+    "core-js": "^3.11.1",
     "hash-for-dep": "^1.4.7",
     "heimdalljs": "^0.2.1",
     "heimdalljs-logger": "^0.1.9",
     "json-stable-stringify": "^1.0.1",
+    "regenerator-runtime": "^0.13.7",
     "rsvp": "^4.8.4",
     "workerpool": "^6.0.2"
   },

yarn.lock

@@ -201,14 +201,6 @@
   dependencies:
     "@babel/helper-plugin-utils" "^7.10.4"
 
-"@babel/polyfill@^7.10.4":
-  version "7.10.4"
-  resolved "https://registry.yarnpkg.com/@babel/polyfill/-/polyfill-7.10.4.tgz#915e5bfe61490ac0199008e35ca9d7d151a8e45a"
-  integrity sha512-8BYcnVqQ5kMD2HXoHInBH7H1b/uP3KdnwCYXOqFnXqguOyuu443WXusbIUbWEfY3Z0Txk0M1uG/8YuAMhNl6zg==
-  dependencies:
-    core-js "^2.6.5"
-    regenerator-runtime "^0.13.4"
-
 "@babel/template@^7.10.4":
   version "7.10.4"
   resolved "https://registry.yarnpkg.com/@babel/template/-/template-7.10.4.tgz#3251996c4200ebc71d1a8fc405fba940f36ba278"
@@ -712,10 +704,10 @@ copy-dereference@^1.0.0:
   resolved "https://registry.yarnpkg.com/copy-dereference/-/copy-dereference-1.0.0.tgz#6b131865420fd81b413ba994b44d3655311152b6"
   integrity sha1-axMYZUIP2BtBO6mUtE02VTERUrY=
 
-core-js@^2.6.5:
-  version "2.6.10"
-  resolved "https://registry.yarnpkg.com/core-js/-/core-js-2.6.10.tgz#8a5b8391f8cc7013da703411ce5b585706300d7f"
-  integrity sha512-I39t74+4t+zau64EN1fE5v2W31Adtc/REhzWN+gWRRXg6WH5qAsZm62DHpQ1+Yhe4047T55jvzz7MUqF/dBBlA==
+core-js@^3.11.1:
+  version "3.11.1"
+  resolved "https://registry.yarnpkg.com/core-js/-/core-js-3.11.1.tgz#f920392bf8ed63a0ec8e4e729857bfa3d121c525"
+  integrity sha512-k93Isqg7e4txZWMGNYwevZL9MiogLk8pd1PtwrmFmi8IBq4GXqUaVW/a33Llt6amSI36uSjd0GWwc9pTT9ALlQ==
 
 core-util-is@~1.0.0:
   version "1.0.2"
@@ -961,9 +953,6 @@ find-babel-config@^1.1.0:
   version "1.2.0"
   resolved "https://registry.yarnpkg.com/find-babel-config/-/find-babel-config-1.2.0.tgz#a9b7b317eb5b9860cda9d54740a8c8337a2283a2"
   integrity sha512-jB2CHJeqy6a820ssiqwrKMeyC6nNdmrcgkKWJWmpoxpE8RKciYJXCcXRq1h2AzCo5I5BJeN2tkGEO3hLTuePRA==
-  dependencies:
-    json5 "^0.5.1"
-    path-exists "^3.0.0"
 
 [email protected], find-up@^3.0.0:
   version "3.0.0"
@@ -1419,11 +1408,6 @@ json-stable-stringify@^1.0.1:
   dependencies:
     jsonify "~0.0.0"
 
-json5@^0.5.1:
-  version "0.5.1"
-  resolved "https://registry.yarnpkg.com/json5/-/json5-0.5.1.tgz#1eade7acc012034ad84e2396767ead9fa5495821"
-  integrity sha1-Hq3nrMASA0rYTiOWdn6tn6VJWCE=
-
 json5@^2.1.2:
   version "2.1.3"
   resolved "https://registry.yarnpkg.com/json5/-/json5-2.1.3.tgz#c9b0f7fa9233bfe5807fe66fcf3a5617ed597d43"
@@ -2050,10 +2034,10 @@ quick-temp@^0.1.2, quick-temp@^0.1.3:
     string_decoder "~1.1.1"
     util-deprecate "~1.0.1"
 
-regenerator-runtime@^0.13.4:
-  version "0.13.5"
-  resolved "https://registry.yarnpkg.com/regenerator-runtime/-/regenerator-runtime-0.13.5.tgz#d878a1d094b4306d10b9096484b33ebd55e26697"
-  integrity sha512-ZS5w8CpKFinUzOwW3c83oPeVXoNsrLsaCoLtJvAClH135j/R77RuymhiSErhm2lKcwSCIpmvIWSbDkIfAqKQlA==
+regenerator-runtime@^0.13.7:
+  version "0.13.7"
+  resolved "https://registry.yarnpkg.com/regenerator-runtime/-/regenerator-runtime-0.13.7.tgz#cac2dacc8a1ea675feaabaeb8ae833898ae46f55"
+  integrity sha512-a54FxoJDIr27pgf7IgeQGxmqUNYrcV338lf/6gH456HZ/PhX+5BcwHXG9ajESmwe6WRO0tAzRUrRmNONWgkrew==
 
 require-directory@^2.1.1:
   version "2.1.1"