chore(deps): update isort requirement from ~=5.7 to ~=5.8 (appium#596)

Updates the requirements on [isort](https://github.com/pycqa/isort) to permit the latest version.
- [Release notes](https://github.com/pycqa/isort/releases)
- [Changelog](https://github.com/PyCQA/isort/blob/develop/CHANGELOG.md)
- [Commits](PyCQA/isort@5.7.0...5.8.0)

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

Author: dependabot[bot]

Pipfile

@@ -22,6 +22,6 @@ mock = "~=4.0"
 
 pylint = "~=2.7"
 astroid = "~=2.5"
-isort = "~=5.7"
+isort = "~=5.8"
 
 mypy = "~=0.812"