Bump pytest from 5.4.1 to 6.2.2 (#124)

Bumps [pytest](https://github.com/pytest-dev/pytest) from 5.4.1 to 6.2.2.
- [Release notes](https://github.com/pytest-dev/pytest/releases)
- [Changelog](https://github.com/pytest-dev/pytest/blob/master/CHANGELOG.rst)
- [Commits](pytest-dev/pytest@5.4.1...6.2.2)

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

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

requirements_test.txt

@@ -1,3 +1,3 @@
-pytest==5.4.1
+pytest==6.2.2
 pytest-cov==2.8.1
 pytest-timeout==1.3.4