fix(package): update babel-loader to version 8.0.1

Closes #279

Author: greenkeeper[bot]

package.json

@@ -10,7 +10,7 @@
   "bugs": "https://github.com/static-dev/spike-core/issues",
   "dependencies": {
     "babel-core": "^6.26.0",
-    "babel-loader": "^7.1.5",
+    "babel-loader": "^8.0.1",
     "browser-sync": "^2.24.6",
     "browser-sync-webpack-plugin": "^1.2.0",
     "filewrap": "^1.0.0",