Update mypy requirement from >= 1.5 to >=1.14.1

Updates the requirements on [mypy](https://github.com/python/mypy) to permit the latest version.
- [Changelog](https://github.com/python/mypy/blob/master/CHANGELOG.md)
- [Commits](python/mypy@v1.5.0...v1.14.1)

---
updated-dependencies:
- dependency-name: mypy
  dependency-version: 1.14.1
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

pyproject.toml

@@ -23,7 +23,7 @@ pytest-cov = ">= 2.8.1"
 tox = ">= 3.9.0"
 flake8 = ">= 4.0.0"
 types-python-dateutil = ">= 2.8.19.14"
-mypy = ">= 1.5"
+mypy = ">=1.14.1"
 
 
 [build-system]