chore(Dependencies): Update babel to the latest version

Author: Gertjan Reynaert

package.json

@@ -42,8 +42,8 @@
     "mkdirp": "^0.5.1"
   },
   "devDependencies": {
-    "babel-cli": "^6.6.5",
-    "babel-core": "^6.7.4",
+    "babel-cli": "^6.7.5",
+    "babel-core": "^6.7.6",
     "babel-istanbul": "^0.7.0",
     "babel-preset-es2015": "^6.6.0",
     "babel-preset-stage-2": "^6.5.0",