Bump query-string from 6.11.1 to 6.12.1 in /client

Bumps [query-string](https://github.com/sindresorhus/query-string) from 6.11.1 to 6.12.1.
- [Release notes](https://github.com/sindresorhus/query-string/releases)
- [Commits](https://github.com/sindresorhus/query-string/compare/v6.11.1...v6.12.1)

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

client/package-lock.json

@@ -18822,9 +18822,9 @@
       "integrity": "sha512-VCdBRNFTX1fyE7Nb6FYoURo/SPe62QCaAyzJvUjwRaIsc+NePBEniHlvxFmmX56+HZphIGtV0XeCirBtpDrTyQ=="
     },
     "query-string": {
-      "version": "6.11.1",
-      "resolved": "https://registry.npmjs.org/query-string/-/query-string-6.11.1.tgz",
-      "integrity": "sha512-1ZvJOUl8ifkkBxu2ByVM/8GijMIPx+cef7u3yroO3Ogm4DOdZcF5dcrWTIlSHe3Pg/mtlt6/eFjObDfJureZZA==",
+      "version": "6.12.1",
+      "resolved": "https://registry.npmjs.org/query-string/-/query-string-6.12.1.tgz",
+      "integrity": "sha512-OHj+zzfRMyj3rmo/6G8a5Ifvw3AleL/EbcHMD27YA31Q+cO5lfmQxECkImuNVjcskLcvBRVHNAB3w6udMs1eAA==",
       "requires": {
         "decode-uri-component": "^0.2.0",
         "split-on-first": "^1.0.0",

client/package.json

@@ -28,7 +28,7 @@
     "is-url-superb": "^3.0.0",
     "moment": "^2.25.3",
     "node-sass": "^4.13.1",
-    "query-string": "^6.11.1",
+    "query-string": "^6.12.1",
     "react": "^16.13.1",
     "react-collapsed": "^3.0.0",
     "react-datepicker": "^2.16.0",