chore(package): update babel-loader to version 8.0.6

Closes #45

Author: greenkeeper[bot]

package.json

@@ -30,7 +30,7 @@
   "devDependencies": {
     "babel-cli": "^6.24.1",
     "babel-core": "^6.24.1",
-    "babel-loader": "^7.0.0",
+    "babel-loader": "^8.0.6",
     "babel-preset-env": "^1.3.3",
     "babel-register": "^6.24.1",
     "chai": "3.5.0",