deps: update dependency mypy to >=1.6,<1.7 (#317)

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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/)) | `>=1.5,<1.6` ->
`>=1.6,<1.7` |
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|
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|
[![passing](https://developer.mend.io/api/mc/badges/compatibility/pypi/mypy/1.5.1/1.6.0?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![confidence](https://developer.mend.io/api/mc/badges/confidence/pypi/mypy/1.5.1/1.6.0?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|

---

### Release Notes

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

### [`v1.6.0`](https://togithub.com/python/mypy/compare/v1.5.1...v1.6.0)

[Compare
Source](https://togithub.com/python/mypy/compare/v1.5.1...v1.6.0)

</details>

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setup.py

@@ -54,7 +54,7 @@
             "coverage>=7.3,<7.4",
             "pylint>=3,<3.1",
             "pytest>=7.4,<7.5",
-            "mypy>=1.5,<1.6",
+            "mypy>=1.6,<1.7",
             "types-python-dateutil",
             "types-requests",
         ],