chore: update from babel5 to babel6

Upgrading to babel6 allows us to use the babel-plugin-debug-macros plugin in a future change.

Prep work for ember-cli#114

Author: Lenny Burdette

build.js

@@ -3,18 +3,20 @@
 var babel = require('babel-core');
 var transform = babel.transform;
 var fs = require('fs');
-var stripHeimdall = require('babel5-plugin-strip-heimdall');
 var mkdirp = require('mkdirp').sync;
 
 mkdirp('./dist/loader');
 var source = fs.readFileSync('./lib/loader/loader.js', 'utf8');
 var instrumented = transform(source, {
-  whitelist: ['es6.destructuring']
+  plugins: ['transform-es2015-destructuring']
 }).code;
 
 var stripped = transform(source, {
-  plugins: [stripHeimdall],
-  whitelist: ['es6.destructuring']
+  // strip-heimdall *must* come before transpiling destructuring
+  plugins: [
+    'babel6-plugin-strip-heimdall',
+    'transform-es2015-destructuring'
+  ],
 }).code;
 
 fs.writeFileSync('./dist/loader/loader.instrument.js', instrumented);

package.json

@@ -9,8 +9,9 @@
   "dependencies": {},
   "devDependencies": {
     "ara": "0.0.3",
-    "babel-core": "^5.0.0",
-    "babel5-plugin-strip-heimdall": "^5.0.2",
+    "babel-core": "^6.25.0",
+    "babel-plugin-transform-es2015-destructuring": "^6.23.0",
+    "babel6-plugin-strip-heimdall": "^6.0.1",
     "heimdalljs": "^0.3.2",
     "jscs": "^2.11.0",
     "jshint": "^2.9.2",