Update pytest requirement from ~=5.2.2 to >=5.2.2,<5.5.0 (#721)

Updates the requirements on [pytest](https://github.com/pytest-dev/pytest) to permit the latest version.
- [Release notes](https://github.com/pytest-dev/pytest/releases)
- [Changelog](https://github.com/pytest-dev/pytest/blob/master/CHANGELOG.rst)
- [Commits](https://github.com/pytest-dev/pytest/compare/5.2.2...5.4.1)

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

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

setup.py

@@ -56,7 +56,7 @@ setup(
     extras_require={
         "docs": ["sphinx_rtd_theme", "sphinx-autobuild"],
         "test": [
-            "pytest~=5.2.2",
+            "pytest>=5.2.2,<5.5.0",
             "pytest-asyncio~=0.10.0",
             "aiohttp~=3.6.2",
             "beautifulsoup4~=4.8.1",