chore(package): update babel-loader to version 6.2.4

https://greenkeeper.io/

Author: greenkeeperio-bot

package.json

@@ -13,7 +13,7 @@
   },
   "devDependencies": {
     "babel-core": "^6.0.16",
-    "babel-loader": "^6.0.0",
+    "babel-loader": "^6.2.4",
     "babel-plugin-transform-es2015-modules-commonjs": "^6.0.15",
     "babel-preset-es2015": "^6.0.15",
     "chai": "~3.5.0",