add isEmptyTranslatableAttribute() to allow custom decision logic

[Gummibeer]

fixes #393
fixes #543
fixes #573

[Gummibeer]

and this is how it looks if you don't want to run local CircleCI cli. 🙈 😂

[dimsav]

@Gummibeer I'm trying to understand why this change fixes the bug. Can you please explain?

Also, the first argument ($key) is never used. Why do we need it in isEmptyTranslatableAttribute()?

[Gummibeer]

@dimsav I see no way to cover all possible cases in this package with a single comparison - all will fail in some circumstances.
Putting the check in a special method which provides $key and $value allows the user to put in his custom logic which can also differ by attribute name and can also combine multiple checks like is_null($value) || $value === ''.
So this is primary the solution to give the user the tools and ability to adjust the logic.

[dimsav]

Love it. Good to go. 👌

[Gummibeer]

https://github.com/dimsav/laravel-translatable/releases/tag/v9.5.0