chore(deps): bump @material-ui/core from 4.9.4 to 4.12.4

Bumps [@material-ui/core](https://github.com/mui-org/material-ui/tree/HEAD/packages/material-ui) from 4.9.4 to 4.12.4.
- [Release notes](https://github.com/mui-org/material-ui/releases)
- [Changelog](https://github.com/mui/material-ui/blob/v4.12.4/CHANGELOG.md)
- [Commits](https://github.com/mui-org/material-ui/commits/v4.12.4/packages/material-ui)

---
updated-dependencies:
- dependency-name: "@material-ui/core"
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

package-lock.json

@@ -40,7 +40,7 @@
     "@etclabscore/react-monaco-editor": "^1.0.3",
     "@json-schema-tools/dereferencer": "^1.5.3",
     "@json-schema-tools/transpiler": "^1.10.2",
-    "@material-ui/core": "^4.5.1",
+    "@material-ui/core": "^4.12.4",
     "@material-ui/icons": "^4.5.1",
     "i18next": "^17.3.0",
     "i18next-browser-languagedetector": "^4.0.0",