* Updated mocha, tests now work with node 20
* Update package-lock.json
* Enable Node CI for v2.0v2.0 branch (#2123)
Run tests for v2.0v2.0 branch too
* Bump CI's node version to 20.x
For some reason the CircleCI results aren't public - clicking the link from GitHub requires a login. I thought it might be easier to try running the tests on GitHub Actions.