Fix type annotation

[egor43]

For issue #254
unittest.patch return MagicMock or AsyncMock: https://github.com/python/cpython/blob/3.11/Lib/unittest/mock.py#L1467

[egor43]

@nicoddemus Do you have time to take a look?

[The-Compiler]

Looking at what typeshed does, this seems to b a step in the right direction - though it breaks things on Python 3.7.

I suppose we could drop 3.7 support now, rather than introducing a conditional (given that it's EOL in 19 days)?

[egor43]

I can do the same:

if sys.version_info >= (3, 8):
    _Mock: TypeAlias = MagicMock | AsyncMock
else:
    _Mock: TypeAlias = MagicMock

Would such a solution work?

[nicoddemus]

@egor43 if your solution works, let's go with that -- while I agree we can drop Python 3.7 soon, better do so in a separate PR.

In addition could you add a changelog entry? Thanks! For version, you can use UNRELEASED.

[egor43]

Thank you @nicoddemus.
Sorry I didn't quite understand about using UNRELEASED for version. Could you tell me more?

[nicoddemus]

The changes for each version starts with a header, for example 3.10.0 (2022-10-05), but the next version is not released yet, so just use UNRELEASED.

[egor43]

I updated the changelog and made changes to the type annotation. Could you review the changes?

[egor43]

If you decide that the changes are useful and can be merged into the master branch, please let me know. If these changes are not relevant, then I will close the PR.
In any case, I thank you for taking the time to my PR.