Readme section for Testing

[jwcmd]

Hello again!

I've gotten to a place where I've been able to make some changes, and I'm ready to begin submitting them upstream. I see a 'test' directory and some things inside of it but it isn't clear to me how I'm supposed to run those tests.

If anyone has a moment, a section in the Readme about how to run the test suite would be appreciated :)

Thanks again for your work on this, I appreciate it!

[jwcmd]

Ah I spoke too soon - Github pointed me to the Contributors doc which I'd missed, this is covered there.