Merge pull request #53 from syuilo/greenkeeper/whatwg-fetch-2.0.2

Update whatwg-fetch to the latest version 🚀

package.json

@@ -147,7 +147,7 @@
     "vinyl-buffer": "1.0.0",
     "vinyl-source-stream": "1.1.0",
     "websocket": "1.0.24",
-    "whatwg-fetch": "2.0.1",
+    "whatwg-fetch": "2.0.2",
     "xml2json": "0.11.0",
     "yargs": "6.6.0"
   }