feat: added support for core-js@3 (thanks @BenWT)

BREAKING CHANGE: drop support for IE9

Author: BenWithJam

babel.config.js

@@ -11,9 +11,8 @@ module.exports = {
           '@babel/preset-env',
           {
             targets: {
-              browsers: ['last 5 versions', 'ie 9', 'defaults'],
+              browsers: ['last 5 versions', 'ie 11', 'defaults'],
             },
-            useBuiltIns: 'usage',
           },
         ],
       ],

package.json

@@ -29,6 +29,7 @@
   },
   "homepage": "https://github.com/relay-tools/react-relay-network-modern#readme",
   "dependencies": {
+    "core-js": "3",
     "extract-files": "^5.0.1"
   },
   "peerDependencies": {

yarn.lock

@@ -2289,6 +2289,11 @@ core-js-pure@3.1.3:
   resolved "https://registry.yarnpkg.com/core-js-pure/-/core-js-pure-3.1.3.tgz#4c90752d5b9471f641514f3728f51c1e0783d0b5"
   integrity sha512-k3JWTrcQBKqjkjI0bkfXS0lbpWPxYuHWfMMjC1VDmzU4Q58IwSbuXSo99YO/hUHlw/EB4AlfA2PVxOGkrIq6dA==
 
+core-js@3:
+  version "3.6.5"
+  resolved "https://registry.yarnpkg.com/core-js/-/core-js-3.6.5.tgz#7395dc273af37fb2e50e9bd3d9fe841285231d1a"
+  integrity sha512-vZVEEwZoIsI+vPEuoF9Iqf5H7/M3eeQqWlQnYa8FSKKePuYTf5MWnxb5SDAzCa60b3JBRS5g9b+Dq7b1y/RCrA==
+
 core-js@^2.4.0:
   version "2.4.1"
   resolved "https://registry.yarnpkg.com/core-js/-/core-js-2.4.1.tgz#4de911e667b0eae9124e34254b53aea6fc618d3e"