chore(deps): bump react-js-cron

Bumps [react-js-cron](https://github.com/xrutayisire/react-js-cron) from 5.2.0 to 6.0.2.
- [Release notes](https://github.com/xrutayisire/react-js-cron/releases)
- [Changelog](https://github.com/xrutayisire/react-js-cron/blob/master/CHANGELOG.md)
- [Commits](xrutayisire/react-js-cron@v5.2.0...v6.0.2)

---
updated-dependencies:
- dependency-name: react-js-cron
  dependency-version: 6.0.2
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

superset-frontend/packages/superset-ui-core/package.json

@@ -53,7 +53,7 @@
     "react-ace": "^14.0.1",
     "react-draggable": "^4.5.0",
     "react-error-boundary": "6.0.0",
-    "react-js-cron": "^5.2.0",
+    "react-js-cron": "^6.0.2",
     "react-markdown": "^8.0.7",
     "react-resize-detector": "^7.1.2",
     "react-syntax-highlighter": "^16.1.0",