Migrate test suite to `tasty`

[jkachmar]

TODO

• add tasty, tasty-hedgehog, etc. as dependencies
• convert existing tests to the new framework
• use tasty-discover for automated test case discovery
• make sure that test logic works as expected
  • tasty checks in parallel by default, so tests must not assume that they can be run sequentially

Description

We use hspec in the monorepo but I suspect we might benefit from using tasty as the test runner (in addition to hspec) since we’re using tasty-bench for automated benchmarks anyway.

At the very least this repo would be a convenient place to test the idea on a small scale, since the existing hedgehog-based test suite makes it a little inconvenient to add unit tests.

[i-am-tom]

Closed by #87

[jkachmar]

I obviously won’t be getting to any of these :)