chore(deps-dev): bump mypy from 1.13.0 to 1.14.1

[dependabot]

Bumps mypy from 1.13.0 to 1.14.1.

Changelog

Sourced from mypy's changelog.

Mypy Release Notes

Next Release

Drop Support for Python 3.9

Mypy no longer supports running with Python 3.9, which has reached end-of-life. When running mypy with Python 3.10+, it is still possible to type check code that needs to support Python 3.9 with the --python-version 3.9 argument. Support for this will be dropped in the first half of 2026!

Contributed by Marc Mueller (PR 20156).

Mypyc Accelerated Mypy Wheels for ARM Windows and Free Threading

For best performance, mypy can be compiled to C extension modules using mypyc. This makes mypy 3-5x faster than when interpreted with pure Python. We now build and upload mypyc accelerated mypy wheels for win_arm64 and cp314t-... to PyPI, making it easy for Windows users on ARM and those using the free theading builds for Python 3.14 to realise this speedup -- just pip install the latest mypy.

Contributed by Marc Mueller (PR mypy_mypyc-wheels#106, PR mypy_mypyc-wheels#110).

Removed flags --force-uppercase-builtins and --force-union-syntax

The --force-uppercase-builtins flag was deprecated and has been a no-op since mypy 1.17.0. Since mypy has dropped support for Python 3.9, the --force-union-syntax flag is no longer necessary.

Contributed by Marc Mueller (PR 20410) and (PR 20405).

Mypy 1.19

We’ve just uploaded mypy 1.19.0 to the Python Package Index (PyPI). Mypy is a static type checker for Python. This release includes new features, performance improvements and bug fixes. You can install it as follows:

python3 -m pip install -U mypy

You can read the full documentation for this release on Read the Docs.

Python 3.9 Support Ending Soon

This is the last mypy feature release that supports Python 3.9, which reached end of life in October 2025.

Performance Improvements

... (truncated)

Commits

• 251d12f Remove +dev from version for release 1.14.1
• 667e5f7 Revert "Remove redundant inheritances from Iterator in builtins" (#18324)
• 67f673a Fix enum truthiness for StrEnum (#18379)
• 3755abb Fix getargs argument passing (#18350)
• b9fa8ee Update version to 1.14.1+dev for point release
• 6f37859 Remove +dev from version for release 1.14
• 5a6a754 Minor updates to 1.14 changelog (#18310)
• 9772d48 Update changelog for release 1.14 (#18301)
• 92473c8 Warn about --follow-untyped-imports (#18249)
• e6ce8be PEP 702 (@​deprecated): descriptors (#18090)
• Additional commits viewable in compare view

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