chore(package): update babylon to version 6.13.1 (#209)

https://greenkeeper.io/

Author: greenkeeperio-bot

package.json

@@ -57,7 +57,7 @@
     "typescript": "2.0.6"
   },
   "dependencies": {
-    "babylon": "6.13.0",
+    "babylon": "6.13.1",
     "dts-dom": "0.1.11",
     "minimist": "1.2.0"
   },