Bump pytest-cov from 2.11.0 to 2.11.1

Bumps [pytest-cov](https://github.com/pytest-dev/pytest-cov) from 2.11.0 to 2.11.1.
- [Release notes](https://github.com/pytest-dev/pytest-cov/releases)
- [Changelog](https://github.com/pytest-dev/pytest-cov/blob/master/CHANGELOG.rst)
- [Commits](pytest-dev/pytest-cov@v2.11.0...v2.11.1)

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

requirements-test.txt

@@ -1,7 +1,7 @@
 # test runs requirements (versions we'll be testing against) - automatically updated by requires.io
 pytest==6.2.1
 pytest-xdist==2.2.0
-pytest-cov==2.11.0
+pytest-cov==2.11.1
 coverage==5.3.1 # pytest-cov
 mock==4.0.3
 port-for==0.4