chore(package): update standard to version 13.0.2

Closes #18

Author: greenkeeper[bot]

package.json

@@ -28,7 +28,7 @@
   "homepage": "https://github.com/danielbayerlein/hapi-webpack-middleware#readme",
   "devDependencies": {
     "snazzy": "^8.0.0",
-    "standard": "^12.0.1"
+    "standard": "^13.0.2"
   },
   "peerDependencies": {
     "webpack": "^4.0.0",