Update pytest requirement from ~7.3 to ~7.4 (#40)

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@7.3.0...7.4.0)

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

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

Author: dependabot[bot]

pyproject.toml

@@ -29,7 +29,7 @@ jsonpickle = "~3.0"
 pymitter = "~0.4"
 
 [tool.poetry.dev-dependencies]
-pytest = "~7.3"
+pytest = "~7.4"
 pytest-asyncio = "~0.21"
 pytest-cov = "~4.1"
 pytest-unordered = "~0.5"