Bump the major-updates group with 3 updates

Bumps the major-updates group with 3 updates: [flake8](https://github.com/pycqa/flake8), [black](https://github.com/psf/black) and [mypy](https://github.com/python/mypy).


Updates `flake8` from 3.9.2 to 5.0.4
- [Commits](PyCQA/flake8@3.9.2...5.0.4)

Updates `black` from 21.12b0 to 23.3.0
- [Release notes](https://github.com/psf/black/releases)
- [Changelog](https://github.com/psf/black/blob/main/CHANGES.md)
- [Commits](https://github.com/psf/black/commits/23.3.0)

Updates `mypy` from 0.910 to 1.4.1
- [Changelog](https://github.com/python/mypy/blob/master/CHANGELOG.md)
- [Commits](python/mypy@v0.910...v1.4.1)

---
updated-dependencies:
- dependency-name: flake8
  dependency-type: direct:development
  update-type: version-update:semver-major
  dependency-group: major-updates
- dependency-name: black
  dependency-type: direct:development
  dependency-group: major-updates
- dependency-name: mypy
  dependency-type: direct:development
  update-type: version-update:semver-major
  dependency-group: major-updates
...

Signed-off-by: dependabot[bot] <[email protected]>

pyproject.toml

@@ -17,10 +17,10 @@ singer-sdk = "^0.34.0"
 [tool.poetry.dev-dependencies]
 pytest = "^7.0.0"
 tox = "^3.24.4"
-flake8 = "^3.9.2"
-black = "^21.9b0"
+flake8 = "^5.0.4"
+black = "^23.3"
 pydocstyle = "^6.1.1"
-mypy = "^0.910"
+mypy = "^1.4"
 types-requests = "^2.26.1"
 isort = "^5.10.1"