Fix Series.rename_axis and DataFrame.rename_axis typing

[dpoznik]

• Closes Series.rename_axis(None) not accepted #1042
• Tests added

Note that the four failing tests also fail on main and are unrelated to these changes:

FAILED tests/test_series.py::test_astype_float['f16'-<class 'numpy.longdouble'>] - TypeError: data type 'f16' not understood
FAILED tests/test_series.py::test_astype_float['float128'-<class 'numpy.longdouble'>] - TypeError: data type 'float128' not understood
FAILED tests/test_series.py::test_astype_complex['c32'-<class 'numpy.clongdouble'>] - TypeError: data type 'c32' not understood
FAILED tests/test_series.py::test_astype_complex['complex256'-<class 'numpy.clongdouble'>] - TypeError: data type 'complex256' not understood

[loicdiridollou]

Are you working on Mac?

Those tests fail on arm64 Mac if I am not wrong because those types are not defined, this is fine. The workflow relies on Mac not arm so once the workflows are kicked off you will see that all tests pass.

[dpoznik]

Are you working on Mac?

Yes

Those tests fail on arm64 Mac if I am not wrong because those types are not defined, this is fine. The workflow relies on Mac not arm so once the workflows are kicked off you will see that all tests pass.

OK, great. Thanks for the heads-up.

[dpoznik]

@loicdiridollou and @Dr-Irv, thanks for you reviews. I believe I have addressed all your comments.

[Dr-Irv]

Thanks @dpoznik