chore(package): update qs to version 6.0.2

http://greenkeeper.io/

Author: greenkeeperio-bot

package.json

@@ -8,7 +8,7 @@
     "multiaddr": "^1.0.0",
     "multipart-stream": "^2.0.0",
     "ndjson": "^1.4.3",
-    "qs": "^6.0.0",
+    "qs": "^6.0.2",
     "require-dir": "^0.3.0",
     "vinyl": "^1.1.0",
     "vinyl-fs-browser": "^2.1.1-1",