Bump pytest-cov from 2.12.1 to 3.0.0 (#34)

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] <[email protected]>

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

Author: dependabot[bot]

poetry.lock

@@ -16,7 +16,7 @@ deprecation = "^2.1.0"
 [tool.poetry.dev-dependencies]
 pytest = "^6.2.5"
 pytest-asyncio = "^0.16.0"
-pytest-cov = "^2.12.1"
+pytest-cov = "^3.0.0"
 mypy = "^0.910"
 black = { version = "^21.7b0", allow-prereleases = true }
 pre-commit = "^2.15.0"