conf: cognitect/test-runner -> Kaocha

[alirezaalavi87]

• Migrate to Kaocha as test runner since it is better maintained and more feature rich than test-runner
• Add test-watch task alias to continously re-run tests on changes

related to issue #187

[alirezaalavi87]

@yogthos Ok so I have replaced all instances of test-runner with kaocha and setup kaocha in deps.edn files.

I run clj -X:test or use the bin/kaocha binstub and it works fine. But I feel like I'm missing something because I'm not actually sure how kit works and how to contribute. (We really need a CONTRIBUTING.md)

[yogthos]

Thanks, and I'll try get around to adding a contributing guideline at some point. It is a bit gnarly. :)

[alirezaalavi87]

Thank you.