chore(package): update babel-loader to version 6.3.1

Closes #81

https://greenkeeper.io/

Author: greenkeeper[bot]

package.json

@@ -83,7 +83,7 @@
   "devDependencies": {
     "auto-changelog": "0.3.1",
     "babel-core": "6.22.1",
-    "babel-loader": "6.2.10",
+    "babel-loader": "6.3.1",
     "babel-plugin-external-helpers": "6.22.0",
     "babel-plugin-istanbul": "3.1.2",
     "babel-plugin-transform-es2015-modules-umd": "6.22.0",