type args and kwargs as Any in series.pyi

[MarcoGorelli]

ref #1168

These are all cases where kwargs / args just exist for compatibility with numpy

Exceptions are:

• to_numpy, where the kwargs get passed to the extensionarray. Given that third parties can develop their own extensionarrays, I think this one really should be Any, we can't know what arguments third party EA authors will accept?

• pct_change: this could be more precise, have opened type kwargs in pct_change according to params in shift #1169 about that

• Closes #xxxx (Replace xxxx with the Github issue number)

• Tests added: Please use assert_type() to assert the type of any return value

[Dr-Irv]

Thanks @MarcoGorelli

[Dr-Irv]

@MarcoGorelli before I merge, this will close #1168, but isn't that issue covering more than just core/series.pyi ? If so, I think it should remain open.

[MarcoGorelli]

yup thanks!