fix: upgrade react-final-form from 6.5.3 to 6.5.7

Snyk has created this PR to upgrade react-final-form from 6.5.3 to 6.5.7.

See this package in npm:
https://www.npmjs.com/package/react-final-form

See this project in Snyk:
https://app.snyk.io/org/jswheeler/project/a0404469-3c39-4599-a304-36e7b2fd9eb8?utm_source=github&utm_medium=referral&page=upgrade-pr

package.json

@@ -75,7 +75,7 @@
     "react-avatar": "^3.9.7",
     "react-datepicker": "^3.4.1",
     "react-dom": "^16.12.0",
-    "react-final-form": "^6.5.2",
+    "react-final-form": "^6.5.7",
     "react-loader-spinner": "^4.0.0",
     "react-outside-click-handler": "^1.3.0",
     "react-popper": "^2.2.3",