Add a dimensions to the comparison to talk about parallel executin/async: true/false

[PragTob]

Hi there,

thanks for writing patch and comparing different mocking libraries.

I believe it is missing a major dimensions though - which is parallel test execution/async: true compatibility. Imo it's a major benefit of elixir and something we usually design for, so any library that doesn't support this (all but mox afaik) has a pretty big downside in my mind. Hence, I think it would be good to highlight this property.

Cheers + Thanks,
Tobi