chore(package): update standard to version 12.0.0

Closes #18

Author: greenkeeper[bot]

package.json

@@ -28,7 +28,7 @@
     "commitizen": "^2.9.5",
     "cz-conventional-changelog": "^1.2.0",
     "semantic-release": "^7.0.1",
-    "standard": "^10.0.1"
+    "standard": "^12.0.0"
   },
   "scripts": {
     "test": "standard",