Vitest Pros:
* Automated failing test comments on github PRs
* A nice local UI with incremental testing when changing files (`yarn
test:ui`)
* Also nicely supported in all major IDEs, click to run test works (so
we won't miss what we had with jest).
* Works well with ESM
Vitest Cons:
* The ESBuild transformer vitest uses takes a little longer to transform
than our current SWC/jest setup, however, it is possible to setup SWC as
the transformer for vitest as well (though it only does one transform,
so we're paying ~7-10 seconds instead of ~ 2-3 seconds in transform
phase).
* Exposes how slow our tests are (tongue in cheek here)
We love all open-source Unleash users. in 2022 we built the [segment
capability](https://docs.getunleash.io/reference/segments) (v4.13) as an
enterprise feature, simplify life for our customers.
Now it is time to contribute it to the world 🌏
---------
Co-authored-by: Thomas Heartman <thomas@getunleash.io>
