Changes the CI to properly cache Nimble deps *including* Nim binaries.
* parallelize tests
* speed up tests
* cache whole nimble
* use nimble install without -d
* bump version
* new nimble cache
* fix github_env
* compare speed
* readd msys2
* don't need make for nimble
* ugh renames
Add CI workflow to run tests.
Add code coverage workflow that publishes results to CodeCov.
Add CI and coverage badges to README.
Bump asynctest to allow for `setupAll` and `teardownAll`.
Add local coverage nimble task.
Combine tests in to a testAll file.
Jaremy Creechley
Ivan Yonchovski
Eric Mastro