test: Migrate CI to GitHub Actions [SDK-4451]

[evansims]

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Description

This pull request replaces our current CircleCI continuous integration suite for auth0-react with a new workflow using GitHub Actions.

References

Please see internal ticket SDK-4451.

Testing

This pull request replaces our continuous integration suite with one built in GitHub's native Actions ecosystem. It aligns with other migrations taking place across our repositories.

Checklist

• [x] I have added documentation for new/changed functionality in this PR or in auth0.com/docs
• [x] All active GitHub checks for tests, formatting, and security are passing
• [x] The correct base branch is being used, if not the default branch

[github-advanced-security[bot]]

This pull request sets up GitHub code scanning for this repository. Once the scans have completed and the checks have passed, the analysis results for this pull request branch will appear on this overview. Once you merge this pull request, the 'Security' tab will show more code scanning analysis results (for example, for the default branch). Depending on your configuration and choice of analysis tool, future pull requests will be annotated with code scanning analysis results. For more information about GitHub code scanning, check out the documentation.

[evansims]

Updated to include Node 16 and 14 build/test matrix