fix: upgrade query-string from 6.13.5 to 6.13.6 (#1617)

Snyk has created this PR to upgrade query-string from 6.13.5 to 6.13.6.

See this package in npm:
https://www.npmjs.com/package/query-string

See this project in Snyk:
https://app.snyk.io/org/acinader/project/953c8e1a-a9ef-4134-afbe-43474913abbb?utm_source=github&utm_medium=upgrade-pr

Author: snyk-bot

package-lock.json

@@ -59,7 +59,7 @@
     "passport-local": "1.0.0",
     "prismjs": "1.22.0",
     "prop-types": "15.7.2",
-    "query-string": "6.13.5",
+    "query-string": "6.13.6",
     "react": "16.14.0",
     "react-ace": "^8.0.0",
     "react-dnd": "10.0.2",