⬆️ Bump isort from 5.3.2 to 5.4.0 (#157)

Bumps [isort](https://github.com/timothycrosley/isort) from 5.3.2 to 5.4.0.
- [Release notes](https://github.com/timothycrosley/isort/releases)
- [Changelog](https://github.com/timothycrosley/isort/blob/develop/CHANGELOG.md)
- [Commits](PyCQA/isort@5.3.2...5.4.0)

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

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

requirements_test.txt

@@ -2,7 +2,7 @@ aresponses==2.0.0
 coverage==5.2.1
 flake8==3.8.3
 flake8-docstrings==1.5.0
-isort==5.3.2
+isort==5.4.0
 mypy==0.782
 pylint==2.5.3
 pytest==6.0.1