chore(package): update standard to version 12.0.1

Closes #23

Author: greenkeeper[bot]

package.json

@@ -32,7 +32,7 @@
     "mocha": "^4.0.0",
     "proxyquire": "^1.7.11",
     "sinon": "^4.0.0",
-    "standard": "^10.0.1",
+    "standard": "^12.0.1",
     "semantic-release": "^7.0.1"
   },
   "repository": "hyperlink/do-dynamic-dns"