chore(package): update babel-preset-es2015 to version 6.13.2

https://greenkeeper.io/

Author: greenkeeperio-bot

package.json

@@ -40,7 +40,7 @@
     "babel-cli": "^6.7.7",
     "babel-core": "^6.7.7",
     "babel-eslint": "^6.0.4",
-    "babel-preset-es2015": "^6.6.0",
+    "babel-preset-es2015": "^6.13.2",
     "code": "^3.0.0",
     "coveralls": "^2.11.9",
     "eslint": "^3.1.0",