Update pytest-cov requirement from <5.0.0,>=2.12.0 to >=2.12.0,<6.0.0

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@v2.12.0...v5.0.0)

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

Signed-off-by: dependabot[bot] <[email protected]>

pyproject.toml

@@ -56,7 +56,7 @@ test = [
     "esmerald>=0.13.0",
     "asynctest>=0.13.0,<1.0.0",
     "pytest >=7.1.3,<8.0.0",
-    "pytest-cov >=2.12.0,<5.0.0",
+    "pytest-cov >=2.12.0,<6.0.0",
 ]
 
 dev = [