Bump mypy from 1.3.0 to 1.4.1

Bumps [mypy](https://github.com/python/mypy) from 1.3.0 to 1.4.1.
- [Commits](python/mypy@v1.3.0...v1.4.1)

---
updated-dependencies:
- dependency-name: mypy
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

poetry.lock

@@ -41,7 +41,7 @@ darglint = "^1.6.0"
 flake8-annotations = "^2.9.1"
 flake8-docstrings = "^1.7.0"
 flake8-isort = "^6.0.0"
-mypy = "^1.3"
+mypy = "^1.4"
 pytype = {version = "^2022.11.29", python = "3.8"}
 typeguard = "^4.1.0"
 xdoctest = "^1.1.0"