⬆️ Bump isort from 5.0.3 to 5.0.4 (#122)

Bumps [isort](https://github.com/timothycrosley/isort) from 5.0.3 to 5.0.4.
- [Release notes](https://github.com/timothycrosley/isort/releases)
- [Changelog](https://github.com/timothycrosley/isort/blob/develop/CHANGELOG.md)
- [Commits](PyCQA/isort@5.0.3...5.0.4)

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

Author: dependabot-preview[bot]

requirements_test.txt

@@ -2,7 +2,7 @@ aresponses==2.0.0
 coverage==5.1
 flake8==3.8.3
 flake8-docstrings==1.5.0
-isort==5.0.3
+isort==5.0.4
 mypy==0.782
 pylint==2.5.3
 pytest==5.4.3