Bump node-fetch and react-native

Bumps [node-fetch](https://github.com/node-fetch/node-fetch) to 2.7.0 and updates ancestor dependency [react-native](https://github.com/facebook/react-native). These dependencies need to be updated together.


Updates `node-fetch` from 1.7.3 to 2.7.0
- [Release notes](https://github.com/node-fetch/node-fetch/releases)
- [Commits](node-fetch/node-fetch@1.7.3...v2.7.0)

Updates `react-native` from 0.63.0 to 0.72.6
- [Release notes](https://github.com/facebook/react-native/releases)
- [Changelog](https://github.com/facebook/react-native/blob/main/CHANGELOG-pre-070.md)
- [Commits](facebook/react-native@v0.63.0...v0.72.6)

---
updated-dependencies:
- dependency-name: node-fetch
  dependency-type: indirect
- dependency-name: react-native
  dependency-type: direct:development
...

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

Author: dependabot[bot]