Merge pull request #10 from zeit/greenkeeper-babel-preset-es2015-6.13.2

Update babel-preset-es2015 to version 6.13.2 🚀

Author: leo

package.json

@@ -17,7 +17,7 @@
     "babel-plugin-transform-object-rest-spread": "6.8.0",
     "babel-plugin-transform-proto-to-assign": "6.9.0",
     "babel-plugin-transform-runtime": "6.12.0",
-    "babel-preset-es2015": "6.9.0",
+    "babel-preset-es2015": "6.13.2",
     "babel-preset-es2015-loose": "7.0.0",
     "babel-preset-react": "6.11.1",
     "babel-register": "6.11.6",