BUG: Fixed bug, where pandas._libs.lib.maybe_convert_objects function improperly handled arrays with bools and NaNs
- [x] closes #32146
- [x] tests added / passed
- [x] passes `black pandas`
- [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff`
- [x] whatsnew entry

Hello @AnnaDaglis! Thanks for updating this PR. We checked the lines you've touched for [PEP 8](https://www.python.org/dev/peps/pep-0008) issues, and found:







There are currently no PEP 8 issues detected in this Pull Request. Cheers! :beers: 

##### Comment last updated at 2020-03-04 13:58:45 UTC @jreback All tests passed. @TomAugspurger @jreback All tests passed. Ok, let's merge this. Having extra tests probably isn't a bad thing :)

Thanks @AnnaDaglis, and congrats on your first PR to pandas! Thanks @AnnaDaglis !