chore(package): update standard to version 12.0.1

Closes #88

Author: greenkeeper[bot]

package.json

@@ -45,6 +45,6 @@
   "devDependencies": {
     "husky": "^0.13.1",
     "lerna": "2.0.0-beta.36",
-    "standard": "^8.3.0"
+    "standard": "^12.0.1"
   }
 }