Bump query-string from 6.13.2 to 6.13.4

Bumps [query-string](https://github.com/sindresorhus/query-string) from 6.13.2 to 6.13.4.
- [Release notes](https://github.com/sindresorhus/query-string/releases)
- [Commits](https://github.com/sindresorhus/query-string/compare/v6.13.2...v6.13.4)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

package.json

@@ -77,7 +77,7 @@
     "material-design-icons-iconfont": "^6.1.0",
     "native-promise-only": "^0.8.0-a",
     "page": "^1.11.6",
-    "query-string": "^6.13.2",
+    "query-string": "^6.13.4",
     "resize-observer-polyfill": "^1.5.1",
     "screenfull": "^5.0.2",
     "sortablejs": "^1.12.0",