chore(package): update babel-loader to version 7.0.0

https://greenkeeper.io/

package.json

@@ -29,7 +29,7 @@
     "babel-eslint": "7.2.2",
     "babel-istanbul": "0.12.2",
     "babel-istanbul-loader": "0.1.0",
-    "babel-loader": "6.4.1",
+    "babel-loader": "7.0.0",
     "babel-plugin-transform-class-properties": "6.18.0",
     "babel-preset-env": "1.4.0",
     "babel-plugin-transform-es2015-modules-commonjs": "6.24.1",