Merge pull request kunalkapadia#111 from KunalKapadia/greenkeeper-babel-cli-6.18.0

Update babel-cli to version 6.18.0 🚀

Author: kunalkapadia

package.json

@@ -57,7 +57,7 @@
     "winston": "2.2.0"
   },
   "devDependencies": {
-    "babel-cli": "6.16.0",
+    "babel-cli": "6.18.0",
     "babel-core": "6.17.0",
     "babel-plugin-add-module-exports": "0.2.1",
     "babel-preset-es2015": "6.16.0",