Fixes a bug I intro and adds Jest tests

[juanpasolano]

Hi @dohomi,

Why

I've recently introduced a bug in this repo on Pr #33 🙈 . This type should not be an array since is type "option" not "options".

What

This PR fixes that bug but also adds an initial suite of tests to prevent us contributors from destroying the releases, it also includes a github action to run the test on PRs.

Caveats:

• There are of course, missing tests, this is an initial approach to prevent some basic errors from contributors like me🙈 .
• For example, the "blok" types need to have more tests since looking at the code there are groups and whitelist but honestly, I am not sure what that does.

Feel free to request any changes you see fit; I appreciate you taking the time to maintain this package. Our dev experience would be horrible without it.

[dohomi]

awesome thanks for taking the initiative to write some tests.. I definitely love the idea but just haven't to time for it