fix(package): update query-string to version 6.11.0

Closes #1450

Author: greenkeeper[bot]

package.json

@@ -58,7 +58,7 @@
     "passport-local": "1.0.0",
     "prismjs": "1.19.0",
     "prop-types": "15.7.2",
-    "query-string": "6.9.0",
+    "query-string": "6.11.0",
     "react": "16.12.0",
     "react-dnd": "10.0.2",
     "react-dnd-html5-backend": "10.0.2",