Bump pytest-cov from 2.10.1 to 2.11.0

Bumps [pytest-cov](https://github.com/pytest-dev/pytest-cov) from 2.10.1 to 2.11.0.
- [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@v2.10.1...v2.11.0)

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

requirements/dev.txt

@@ -4,20 +4,18 @@
 #
 #    pip-compile --output-file=requirements/dev.txt requirements/dev.in
 #
-atomicwrites==1.4.0       # via pytest
 attrs==20.3.0             # via pytest
 click==7.1.2              # via pip-tools
-colorama==0.4.4           # via pytest
 coverage==5.3.1           # via pytest-cov
 iniconfig==1.1.1          # via pytest
-lxml==4.6.2; implementation_name != 'pypy'               # via -r requirements/dev.in
+lxml==4.6.2               # via -r requirements/dev.in
 mock==4.0.3               # via -r requirements/dev.in
 packaging==20.8           # via pytest
 pip-tools==5.4.0          # via -r requirements/dev.in
 pluggy==0.13.1            # via pytest
 py==1.10.0                # via pytest
 pyparsing==2.4.7          # via packaging
-pytest-cov==2.10.1        # via -r requirements/dev.in
+pytest-cov==2.11.0        # via -r requirements/dev.in
 pytest==6.2.1             # via -r requirements/dev.in, pytest-cov
 six==1.15.0               # via pip-tools
 toml==0.10.2              # via pytest