Add a matched() -> bool method to mock

[max-b]

Hi!

Thanks so much for this library - I really appreciate the work you've put into it! I have a slightly unusual use case surrounding testing async processing and I'd basically like to check to see if the mock has matched while not panicking. It looks like mockito::mock isn't UnwindSafe so catching the assert panic requires wrapping it in a AssertUnwindSafe which I'm not totally sure is correct.

This just provides a matched method that returns a bool for this particular use case. Let me know what you think/if it's appropriate or not!

Thanks!!!

[lipanski]

@max-b looks good, thanks for your contribution (and special 🥇 for updating the docs). I think this can fit into the library so I'm going to merge.

[lipanski]

Released in 0.27.0 🚀

[max-b]

🎉 thanks!!