add/testing

[JohnDaly]

Changes

• Moving requireUp function to its own file, and updating it with the fix mentioned here
• Adding constants.js file, which exports the default file extensions to check for
• Adding a fixtures directory, which contains sample directory structures to use for testing
• Adding Vitest as a dev dependency to run the tests
• Writing unit tests for requireUp function

I'll leave the choice of testing framework and package manager to @cletusw. I chose Vitest to write the tests, but it could be swapped out for other options (e.g. Jest, Mocha) without too much trouble.

[cletusw]

This is incredible, thank you so much! And yes, vitest looks just fine (hadn't heard of it before).

Hope you don't mind I added prettier and used it to standardize the quotes.

[cletusw]

Okay, published v1.3.0 -- @diegocr @JohnDaly let me know if things are working alright, thanks!

[diegocr]

Great work there @JohnDaly

Just tested 1.3.0 and all is fine @cletusw

Thanks guys! 😍

[JohnDaly]

This is incredible, thank you so much!

No problem, thanks for this package!

Hope you don't mind I added prettier and used it to standardize the quotes.

👍