Bump flake8-simplify from 0.19.3 to 0.20.0 (#72)

Bumps [flake8-simplify](https://github.com/MartinThoma/flake8-simplify) from 0.19.3 to 0.20.0.
- [Release notes](https://github.com/MartinThoma/flake8-simplify/releases)
- [Changelog](https://github.com/MartinThoma/flake8-simplify/blob/master/CHANGELOG.md)
- [Commits](https://github.com/MartinThoma/flake8-simplify/commits)

---
updated-dependencies:
- dependency-name: flake8-simplify
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

pyproject.toml

@@ -33,7 +33,7 @@ flake8-pie = "^0.16.0"
 flake8-pyproject = "^1.2.2"
 flake8-pytest-style = "^1.7.2"
 flake8-requirements = "^1.7.7"
-flake8-simplify = "^0.19.3"
+flake8-simplify = ">=0.19.3,<0.21.0"
 flake8-unused-arguments = "^0.0.13"
 flake8-use-pathlib = "^0.3.0"
 isort = "^5.12.0"