Use \Throwable exclusively in rejection function docs

[jsor]

Follow-up for #138.

[clue]

The changeset looks reasonable to me, but just one question: Is is common knowledge that Throwable is the base of Exception or should we perhaps make this more explicit? It's my understanding most common use cases would likely reject a promise with a subclass of Exception such as RuntimeException (and family) and it might make sense to keep this as a search keyword in the documentation?

[jsor]

Good point, i will try to rework the docs 👍 . But we must make sure to not recommend \Exception as type-declarations in callbacks. Used eg. in otherwise() callbacks, this might lead to uncaught \Error's.

[clue]

I concur, adding Throwable as the type hint and adding explicit docs for Exception seems to be the best solution here 👍

[WyriHaximus]

@clue added a short paragraph about Throwable vs Exception.

[clue]

Thanks for the update, changes LGTM! 💯

[WyriHaximus]

🎉 !