fix(typing): Support any valid number for utility props that needs it

[kamalbennani]

Summary

Based on the code itself and the website, some declarations don't match the actual typing of some props.

For instance, sizing props such as w/h or even border/borderWidth should accept any valid number (not only the numbers defined in the theme).
"Any valid value is accepted in width, numbers are converted to px, other units have to be specified."

So, I went through all the exposed props and I've updated the typing to add the missing valid type which is number in this case.

[kamalbennani]

Hi @gregberge 👋
I was wondering if my two opened PRs are approved and fully tested (with the one that was merged previously), would it be possible to release a patch version of the library ^^'
Let me know if I missed anything, I'd be happy to take care of it.
Thanks.