Bump nitpick from 0.21.3 to 0.21.4 (#199)

Bumps [nitpick](https://github.com/andreoliwa/nitpick) from 0.21.3 to 0.21.4.
- [Release notes](https://github.com/andreoliwa/nitpick/releases)
- [Changelog](https://github.com/andreoliwa/nitpick/blob/develop/CHANGELOG.md)
- [Commits](andreoliwa/nitpick@v0.21.3...v0.21.4)

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

Co-authored-by: dependabot-preview[bot] <27856297+dependabot-preview[bot]@users.noreply.github.com>

pyproject.toml

@@ -40,7 +40,7 @@ typing_extensions = "^3.6"
 wemake-python-styleguide = "^0.13.4"
 flake8-pytest = "^1.3"
 flake8-pytest-style = "^0.5.0"
-nitpick = "^0.21.3"
+nitpick = "^0.21.4"
 mypy = "^0.761"
 
 pytest = "^5.3"