Support autodoc_type_aliases configuration

[tikuma-lsuhsc]

This PR addresses Issues #284.

Currently, autodoc-typehints does not honor the autodoc_type_aliases configuration of sphinx.ext.autodoc. For example,

from numpy.typing import ArrayLike

def func(x: ArrayLike):...

renders

**func(x: _SupportsArray[dtype[Any]] |
_NestedSequence[_SupportsArray[dtype[Any]]] | bool | int | float |
complex | str | bytes | _NestedSequence[bool | int | float | complex |
str | bytes])

even if autodoc_type_aliases = {'ArrayLike': 'ArrayLike'} line in conf.py.

I modified autodoc_typehints to pass app.config.autodoc_type_aliases to sphinx_signature() calls to match sphinx.ext.autodoc and print the alias instead of the annotation as discovered.

test_integration_autodoc_type_aliases.py is a simple pytest script to check the conservation of ArrayLike annotation in a function argument.

[tikuma-lsuhsc]

@gaborbernat - Could you help me sort out the tox env type check errors?

I'm getting

tests/test_integration_autodoc_type_aliases.py:22: error: "T" has no attribute "EXPECTED"  [attr-defined]
tests/test_integration_autodoc_type_aliases.py:23: error: "T" has no attribute "OPTIONS"  [attr-defined]
tests/test_integration_autodoc_type_aliases.py:31: error: "T" has no attribute "WARNING"  [attr-defined]
tests/test_integration_autodoc_type_aliases.py:56: error: Missing return statement  [empty-body]

I got the last one, but not clear about the others. I created the test file by copying then stripping away existing tests of the test_integration.py. Thanks

[gaborbernat]

Nothing jumps out for me from the top of my head. 🤔

[tikuma-lsuhsc]

OK. I'll look into it when I get home tonight.

[tikuma-lsuhsc]

Resolved the issue (I think). The test file test_integration.py was excluded from the mypy type check via pyproject.toml. If you try to merge again, it should work now. Thanks.

[gaborbernat]