Update pytest requirement from <7.0,>=6.2.4 to >=6.2.4,<8.0

Updates the requirements on [pytest](https://github.com/pytest-dev/pytest) to permit the latest version.
- [Release notes](https://github.com/pytest-dev/pytest/releases)
- [Changelog](https://github.com/pytest-dev/pytest/blob/main/CHANGELOG.rst)
- [Commits](pytest-dev/pytest@6.2.4...7.0.0)

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

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

Author: dependabot[bot]

requirements_dev.txt

@@ -11,6 +11,6 @@ mypy>=0.910,<1.0
 pylint>=2.9.6,<3.0
 pytest-benchmark>=3.4.1,<4.0
 pytest-cov>=2.12.1,<4.0
-pytest>=6.2.4,<7.0
+pytest>=6.2.4,<8.0
 requests>=2.25.1,<3.0
 mkdocs-material>=8.0.1,<9.0