Update Babel config (#31011)

* remove plugin-proposal-object-rest-spread
* add bugfixes
* `exclude: ['transform-typeof-symbol']` did nothing with our config

.babelrc.js

@@ -4,14 +4,11 @@ module.exports = {
       '@babel/preset-env',
       {
         loose: true,
-        modules: false,
-        exclude: ['transform-typeof-symbol']
+        bugfixes: true,
+        modules: false
       }
     ]
   ],
-  plugins: [
-    '@babel/plugin-proposal-object-rest-spread'
-  ],
   env: {
     test: {
       plugins: [ 'istanbul' ]

package.json

@@ -111,7 +111,6 @@
   "devDependencies": {
     "@babel/cli": "^7.10.3",
     "@babel/core": "^7.10.3",
-    "@babel/plugin-proposal-object-rest-spread": "^7.10.3",
     "@babel/preset-env": "^7.10.3",
     "@rollup/plugin-babel": "^5.0.4",
     "@rollup/plugin-commonjs": "^13.0.0",