chore(package): update standard to version 12.0.0

Author: greenkeeper[bot]

package.json

@@ -13,7 +13,7 @@
   },
   "devDependencies": {
     "prettier-standard": "^8.0.1",
-    "standard": "^11.0.1",
+    "standard": "^12.0.0",
     "tape": "^4.8.0"
   },
   "publishConfig": {