Update pytest-cov requirement from ^3.0.0 to ^4.1.0 (#15)

Updates the requirements on [pytest-cov](https://github.com/pytest-dev/pytest-cov) to permit the latest version.
- [Changelog](https://github.com/pytest-dev/pytest-cov/blob/master/CHANGELOG.rst)
- [Commits](pytest-dev/pytest-cov@v3.0.0...v4.1.0)

---
updated-dependencies:
- dependency-name: pytest-cov
  dependency-type: direct:development
...

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

pyproject.toml

@@ -10,7 +10,7 @@ python = "^3.9"
 
 [tool.poetry.dev-dependencies]
 pytest = "7.3.2"
-pytest-cov = "^3.0.0"
+pytest-cov = "^4.1.0"
 flake8 = "^6.0.0"
 black = "^23.3.0"