Add check for zero denominator in approx

[jayendra-patil33]

closes #10533

[nicoddemus]

Thanks @jayendra-patil33!

Could you please:

1. Add a test to avoid future regressions?

2. Add a changelog entry, as a new file changelog/10533.bugfix.rst describing the fix, like:

   Fix :func:`pytest.approx` handling of dictionaries containing one or more values of `0.0`.
   

[jayendra-patil33]

Done

[nicoddemus]

Hi @jayendra-patil33,

I don't see the requested changes, did you forget to push perhaps?

[jayendra-patil33]

Sorry, it seems that was indeed the case, now I have pushed the code.

[nicoddemus]

Awesome, thanks!