Move babel-standalone into main Babel repo (#6029)

* Move babel-standalone into main Babel repo

* Don't try to gather coverage data for babel-standalone test

* Fix JSX test

* Always use npm v4 on Travis

* Include pull request number as part of version number

* Cherry-picking 5721b2e43e

Remove deprecated packages to prevent Babel v6 files from being pulled in

* Use RootMostResolvePlugin to dedupe packages

* Avoid destructuring so the build works on archaic Node.js versions

* - Fix version number
- Remove Babili packages (they should be in separate babili-standalone)
- Remove deprecated  syntax-class-constructor-call

* - Remove more Babili packages
- Remove `babel-plugin-inline-replace-variables` for now as it pulls in Babel 6 stuff

* Actually remove reference to babel-plugin-undeclared-variables-check

* Add Babylon to root package.json so we hoist the right version. This fixes the tests.

package.json

@@ -14,11 +14,13 @@
     "babel-cli": "7.0.0-alpha.18",
     "babel-core": "7.0.0-alpha.18",
     "babel-eslint": "8.0.0-alpha.15",
+    "babel-loader": "^7.1.1",
     "babel-plugin-istanbul": "^4.1.4",
     "babel-preset-env": "2.0.0-alpha.18",
     "babel-preset-flow": "7.0.0-alpha.18",
     "babel-preset-stage-0": "7.0.0-alpha.18",
     "babel-register": "7.0.0-alpha.18",
+    "babylon": "7.0.0-beta.18",
     "browserify": "^13.1.1",
     "bundle-collapser": "^1.2.1",
     "chai": "^4.1.0",
@@ -58,7 +60,8 @@
     "all": true,
     "exclude": [
       "scripts/*.js",
-      "packages/*/test/**"
+      "packages/*/test/**",
+      "packages/babel-standalone/**"
     ],
     "sourceMap": false,
     "instrument": false