chore(package): update mafmt to version 2.1.2

https://greenkeeper.io/

Author: greenkeeperio-bot

package.json

@@ -42,7 +42,7 @@
     "interface-connection": "0.1.8",
     "ip-address": "^5.8.0",
     "lodash.contains": "^2.4.3",
-    "mafmt": "^2.1.0",
+    "mafmt": "^2.1.2",
     "multiaddr": "^2.0.2",
     "run-parallel": "^1.1.6"
   },