zoellner
Add tests
I tried it out but ran into many issues (will report them separately as soon as I get some idea if they are all the same issue or several different ones), suspecting that this library does not support Node v10 (or something else relevant to my setup).
Adding some basic tests would allow me to verify if the code runs as expected in my environment.
Some inspiration: https://github.com/SpiderStrategies/node-gmail-api/tree/master/test (including tests for batch requests using nock) https://github.com/fedecia/gmail-api-sync/tree/master/test (includes helper scripts to generate access tokens)
I don't think there's much in here that would cause issues on node v10 vs earlier versions.
PRs welcome to add test.
