Upgrade Babel to 7.0.0-rc.1 (major) (vercel#4937)

Fixes vercel#4691
Fixes vercel#4614

This PR gives path to vercel/next-plugins#242

I did not add or remove `^` near dependency versions in package.json files. However, I don't exclude that some changes can be made given that rc is more stable than beta.

Author: kachkaev

build/babel/preset.js

@@ -39,7 +39,6 @@ module.exports = (context, opts = {}) => ({
     require('@babel/plugin-proposal-object-rest-spread'),
     [require('@babel/plugin-transform-runtime'), opts['transform-runtime'] || {
       helpers: false,
-      polyfill: false,
       regenerator: true
     }],
     [require('styled-jsx/babel'), styledJsxOptions(opts['styled-jsx'])],

examples/custom-server-typescript/package.json

@@ -5,7 +5,7 @@
     "start": "NODE_ENV=production node .next/production-server/index.js"
   },
   "dependencies": {
-    "@babel/core": "^7.0.0-beta.48",
+    "@babel/core": "^7.0.0-rc.1",
     "@zeit/next-typescript": "1.1.0",
     "babel-loader": "^7.1.4",
     "next": "latest",

examples/with-configured-preset-env/.babelrc

@@ -16,8 +16,7 @@
             },
             "transform-runtime": {
               "regenerator": false,
-              "useBuiltIns": true,
-              "polyfill": false
+              "useBuiltIns": true
             }
           }
         ]

examples/with-custom-babel-config/package.json

@@ -16,6 +16,6 @@
   "author": "",
   "license": "ISC",
   "devDependencies": {
-    "@babel/plugin-proposal-do-expressions": "7.0.0-beta.56"
+    "@babel/plugin-proposal-do-expressions": "7.0.0-rc.1"
   }
 }

examples/with-firebase-hosting/package.json

@@ -27,7 +27,7 @@
     "react-dom": "^16.3.2"
   },
   "devDependencies": {
-    "@babel/cli": "^7.0.0-beta.42",
+    "@babel/cli": "^7.0.0-rc.1",
     "cpx": "1.5.0",
     "firebase-tools": "3.18.4",
     "prettier": "1.12.1",

package.json

@@ -58,16 +58,16 @@
     "bin/*": "standard"
   },
   "dependencies": {
-    "@babel/core": "7.0.0-beta.42",
-    "@babel/plugin-proposal-class-properties": "7.0.0-beta.42",
-    "@babel/plugin-proposal-object-rest-spread": "7.0.0-beta.42",
-    "@babel/plugin-syntax-dynamic-import": "7.0.0-beta.42",
-    "@babel/plugin-transform-react-jsx-source": "7.0.0-beta.42",
-    "@babel/plugin-transform-runtime": "7.0.0-beta.42",
-    "@babel/preset-env": "7.0.0-beta.42",
-    "@babel/preset-react": "7.0.0-beta.42",
-    "@babel/runtime": "7.0.0-beta.42",
-    "@babel/template": "7.0.0-beta.42",
+    "@babel/core": "7.0.0-rc.1",
+    "@babel/plugin-proposal-class-properties": "7.0.0-rc.1",
+    "@babel/plugin-proposal-object-rest-spread": "7.0.0-rc.1",
+    "@babel/plugin-syntax-dynamic-import": "7.0.0-rc.1",
+    "@babel/plugin-transform-react-jsx-source": "7.0.0-rc.1",
+    "@babel/plugin-transform-runtime": "7.0.0-rc.1",
+    "@babel/preset-env": "7.0.0-rc.1",
+    "@babel/preset-react": "7.0.0-rc.1",
+    "@babel/runtime": "7.0.0-rc.1",
+    "@babel/template": "7.0.0-rc.1",
     "ansi-html": "0.0.7",
     "babel-core": "7.0.0-bridge.0",
     "babel-loader": "8.0.0-beta.3",
@@ -112,7 +112,7 @@
     "write-file-webpack-plugin": "4.3.2"
   },
   "devDependencies": {
-    "@babel/preset-flow": "7.0.0-beta.43",
+    "@babel/preset-flow": "7.0.0-rc.1",
     "@taskr/babel": "1.1.0-next.1",
     "@taskr/clear": "1.1.0",
     "@taskr/esnext": "1.1.0",