chore(package): update standard to version 12.0.0

Closes #25

Author: greenkeeper[bot]

package.json

@@ -13,7 +13,7 @@
     "nyc": "^10.0.0",
     "reshape": "0.5.0",
     "snazzy": "^6.0.0",
-    "standard": "10.0.0"
+    "standard": "12.0.0"
   },
   "engines": {
     "node": ">= 6.0.0"