chore(package): update babel-core to version 6.10.4

https://greenkeeper.io/

package.json

@@ -149,7 +149,7 @@
   },
   "devDependencies": {
     "autoprefixer-loader": "3.2.0",
-    "babel-core": "6.9.1",
+    "babel-core": "6.10.4",
     "babel-eslint": "6.0.4",
     "babel-gettext-extractor": "git+https://github.com/muffinresearch/babel-gettext-extractor.git#f0f00b2afb71cba5edfb43d377bde9e1b08cdb46",
     "babel-istanbul": "0.8.0",