Upgrade babel and associated plugins to v7

Ignore __tests__ folders in babel transpilation

Author: AaronCCWong

.babelrc

@@ -1,5 +1,5 @@
 module.exports = {
-  "presets": [["env", {
+  "presets": [["@babel/preset-env", {
     "modules": process.env.BABEL_MODULES ? false : 'commonjs',
     "targets": {
       "node": 6,
@@ -15,12 +15,12 @@ module.exports = {
   "plugins": [
     "./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}]
   ]
 };

.babelrc.js

@@ -24,8 +24,8 @@
     "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 --silent -- npm run testonly && nyc report --reporter text-lcov | coveralls",
     "lint": "eslint --rulesdir ./resources/lint src || (printf '\\033[33mTry: \\033[7m npm run lint -- --fix \\033[0m\\n' && exit 1)",
@@ -37,8 +37,8 @@
     "build:clean": "rm -rf ./dist && mkdir ./dist",
     "build:cp": "cp README.md LICENSE ./dist",
     "build:package-json": "node ./resources/copy-package-json.js",
-    "build:cjs": "babel src --optional runtime --ignore __tests__ --out-dir dist/",
-    "build:mjs": "BABEL_MODULES=1 babel src --optional runtime --ignore __tests__ --out-dir dist/module/ && for file in $(find dist/module -name '*.js'); do mv \"$file\" `echo \"$file\" | sed 's/dist\\/module/dist/g; s/.js$/.mjs/g'`; done && rm -rf dist/module",
+    "build:cjs": "babel src --optional runtime --ignore '**/__tests__' --out-dir dist/",
+    "build:mjs": "BABEL_MODULES=1 babel src --optional runtime --ignore '**/__tests__' --out-dir dist/module/ && for file in $(find dist/module -name '*.js'); do mv \"$file\" `echo \"$file\" | sed 's/dist\\/module/dist/g; s/.js$/.mjs/g'`; done && rm -rf dist/module",
     "build:flow": "for file in $(find ./src -name '*.js' -not -path '*/__tests__*'); do cp \"$file\" `echo \"$file\" | sed 's/\\/src\\//\\/dist\\//g'`.flow; done",
     "preversion": ". ./resources/checkgit.sh && npm test",
     "prepublishOnly": ". ./resources/prepublish.sh",
@@ -48,16 +48,22 @@
     "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-flow-strip-types": "6.22.0",
-    "babel-plugin-transform-object-rest-spread": "6.26.0",
-    "babel-polyfill": "^6.26.0",
-    "babel-preset-env": "^1.7.0",
-    "babel-register": "^6.26.0",
     "beautify-benchmark": "0.2.4",
     "benchmark": "2.1.4",
     "chai": "4.1.2",