Bump pytest-cov from 2.12.1 to 3.0.0 (#1093)

Bumps [pytest-cov](https://github.com/pytest-dev/pytest-cov) from 2.12.1 to 3.0.0.
- [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@v2.12.1...v3.0.0)

---
updated-dependencies:
- dependency-name: pytest-cov
  dependency-type: direct:development
  update-type: version-update:semver-major
...

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

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

Author: dependabot[bot]

poetry.lock

@@ -77,7 +77,7 @@ codespell = "^2.1"
 safety = "^1.10"
 
 pytest = "^6.2"
-pytest-cov = "^2.12"
+pytest-cov = "^3.0"
 pytest-randomly = "^3.10"
 pytest-mypy-plugins = "^1.9"
 pytest-subtests = "^0.5"