chore(package): update standard to version 12.0.0

Closes #132

Author: greenkeeper[bot]

package.json

@@ -32,7 +32,7 @@
     "untildify": "^3.0.2"
   },
   "devDependencies": {
-    "standard": "^10.0.3"
+    "standard": "^12.0.0"
   },
   "package-deps": [
     "go-plus"