Bump node-fetch and create-react-class in /dashboard (#1133)

Removes [node-fetch](https://github.com/node-fetch/node-fetch). It's no longer used after updating ancestor dependency [create-react-class](https://github.com/facebook/react). These dependencies need to be updated together.


Removes `node-fetch`

Updates `create-react-class` from 15.6.3 to 15.7.0
- [Release notes](https://github.com/facebook/react/releases)
- [Changelog](https://github.com/facebook/react/blob/main/CHANGELOG.md)
- [Commits](https://github.com/facebook/react/commits/v15.7.0)

---
updated-dependencies:
- dependency-name: node-fetch
  dependency-type: indirect
- dependency-name: create-react-class
  dependency-type: indirect
...

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Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]