chore(package): update standard to version 12.0.1

Closes #36

Author: greenkeeper[bot]

package.json

@@ -66,7 +66,7 @@
     "browserify": "^16.1.1",
     "budo": "^11.1.7",
     "react-dom": "^16.2.0",
-    "standard": "^11.0.0",
+    "standard": "^12.0.1",
     "standard-version": "^4.0.0",
     "uglify-js": "^3.0.13",
     "weallbehave": "^1.2.0",