Upgrade babel and associated plugins to v7

Author: AaronCCWong

.babelrc

@@ -1,5 +1,5 @@
 {
-  "presets": [["env", {
+  "presets": [["@babel/preset-env", {
     "modules": false,
     "targets": {
       "node": 4,
@@ -16,12 +16,12 @@
     "./resources/common-js-modules",
     "./resources/inline-invariant",
     "syntax-async-functions",
-    "syntax-async-generators",
-    "transform-class-properties",
-    "transform-flow-strip-types",
-    "transform-object-rest-spread",
-    ["transform-es2015-classes", {"loose": true}],
-    ["transform-es2015-destructuring", {"loose": true}],
-    ["transform-es2015-spread", {"loose": true}]
+    "@babel/plugin-syntax-async-generators",
+    "@babel/plugin-proposal-class-properties",
+    "@babel/plugin-transform-flow-strip-types",
+    "@babel/plugin-proposal-object-rest-spread",
+    ["@babel/plugin-transform-classes", {"loose": true}],
+    ["@babel/plugin-transform-destructuring", {"loose": true}],
+    ["@babel/plugin-transform-spread", {"loose": true}]
   ]
 }

package.json

@@ -18,8 +18,8 @@
     "watch": "babel-node ./resources/watch.js",
     "test": "npm run lint && npm run check && npm run testonly",
     "test:ci": "npm run lint && npm run check && npm run testonly:coveralls",
-    "t": "mocha --require babel-register --require babel-polyfill",
-    "testonly": "mocha --require babel-register --require babel-polyfill --check-leaks --full-trace --timeout 15000 src/**/__tests__/**/*-test.js",
+    "t": "mocha --require @babel/register --require @babel/polyfill",
+    "testonly": "mocha --require @babel/register --require @babel/polyfill --check-leaks --full-trace --timeout 15000 src/**/__tests__/**/*-test.js",
     "testonly:cover": "nyc --reporter html --reporter text-summary -- npm run testonly",
     "testonly:coveralls": "nyc --reporter text-lcov npm run testonly | coveralls",
     "lint": "eslint --rulesdir ./resources/lint src || (printf '\\033[33mTry: \\033[7m npm run lint -- --fix \\033[0m\\n' && exit 1)",
@@ -42,17 +42,22 @@
     "iterall": "^1.2.2"
   },
   "devDependencies": {
-    "babel-cli": "6.26.0",
+    "@babel/cli": "^7.0.0-beta.46",
+    "@babel/core": "^7.0.0-beta.46",
+    "@babel/node": "^7.0.0-beta.46",
+    "@babel/plugin-proposal-class-properties": "^7.0.0-beta.46",
+    "@babel/plugin-proposal-object-rest-spread": "^7.0.0-beta.46",
+    "@babel/plugin-syntax-async-generators": "^7.0.0-beta.46",
+    "@babel/plugin-transform-classes": "^7.0.0-beta.46",
+    "@babel/plugin-transform-destructuring": "^7.0.0-beta.46",
+    "@babel/plugin-transform-flow-strip-types": "^7.0.0-beta.46",
+    "@babel/plugin-transform-modules-commonjs": "^7.0.0-beta.46",
+    "@babel/plugin-transform-spread": "^7.0.0-beta.46",
+    "@babel/polyfill": "^7.0.0-beta.46",
+    "@babel/preset-env": "^7.0.0-beta.46",
+    "@babel/register": "^7.0.0-beta.46",
     "babel-eslint": "8.2.3",
     "babel-plugin-syntax-async-functions": "6.13.0",
-    "babel-plugin-syntax-async-generators": "6.13.0",
-    "babel-plugin-transform-class-properties": "6.24.1",
-    "babel-plugin-transform-es2015-modules-commonjs": "6.26.0",
-    "babel-plugin-transform-flow-strip-types": "6.22.0",
-    "babel-plugin-transform-object-rest-spread": "6.26.0",
-    "babel-polyfill": "^6.26.0",
-    "babel-preset-env": "^1.5.2",
-    "babel-register": "^6.26.0",
     "beautify-benchmark": "0.2.4",
     "benchmark": "2.1.4",
     "chai": "4.1.2",

resources/common-js-modules.js

@@ -14,4 +14,4 @@
  */
 module.exports = process.env.BABEL_MODULES ?
   () => ({}) :
-  require('babel-plugin-transform-es2015-modules-commonjs');
+  require('@babel/plugin-transform-modules-commonjs');