⬆️ Bump isort from 5.6.4 to 5.7.0 (#223)

Bumps [isort](https://github.com/pycqa/isort) from 5.6.4 to 5.7.0.
- [Release notes](https://github.com/pycqa/isort/releases)
- [Changelog](https://github.com/PyCQA/isort/blob/develop/CHANGELOG.md)
- [Commits](PyCQA/isort@5.6.4...5.7.0)

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

requirements_test.txt

@@ -2,7 +2,7 @@ aresponses==2.0.2
 coverage==5.3.1
 flake8==3.8.4
 flake8-docstrings==1.5.0
-isort==5.6.4
+isort==5.7.0
 mypy==0.790
 pylint==2.6.0
 pytest==6.2.1