Update dependency mypy to v1.7.0 (#380)

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This PR contains the following updates:

| Package | Change | Age | Adoption | Passing | Confidence |
|---|---|---|---|---|---|
| [mypy](https://www.mypy-lang.org/)
([source](https://togithub.com/python/mypy),
[changelog](https://mypy-lang.blogspot.com/)) | `==1.6.1` -> `==1.7.0` |
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|
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|
[![passing](https://developer.mend.io/api/mc/badges/compatibility/pypi/mypy/1.6.1/1.7.0?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![confidence](https://developer.mend.io/api/mc/badges/confidence/pypi/mypy/1.6.1/1.7.0?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|

---

### Release Notes

<details>
<summary>python/mypy (mypy)</summary>

### [`v1.7.0`](https://togithub.com/python/mypy/compare/v1.6.1...v1.7.0)

[Compare
Source](https://togithub.com/python/mypy/compare/v1.6.1...v1.7.0)

</details>

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requirements.txt

@@ -3,7 +3,7 @@ aiofiles==23.2.1
 black==23.11.0
 coverage==7.3.2
 GitPython==3.1.40
-mypy==1.6.1
+mypy==1.7.0
 nest_asyncio==1.5.8
 pdoc==14.1.0
 pip==23.3.1