fix: upgrade formiojs from 4.19.4 to 4.20.0

Snyk has created this PR to upgrade formiojs from 4.19.4 to 4.20.0.

See this package in npm:
formiojs

See this project in Snyk:
https://app.snyk.io/org/heather-formio/project/aa5dd4ba-e59d-4671-b6b3-c08d858520fc?utm_source=github&utm_medium=referral&page=upgrade-pr

package.json

@@ -29,7 +29,7 @@
     "eventemitter2": "^6.4.7",
     "flatpickr": "^4.6.13",
     "font-awesome": "^4.7.0",
-    "formiojs": "4.19.4",
+    "formiojs": "4.20.0",
     "i18next": "^21.8.16",
     "seamless": "^1.4.1"
   },