Update pytest requirement from ==6.2.* to ==7.4.*

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@6.2.0.dev0...7.4.0)

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

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

requirements-dev.txt

@@ -4,7 +4,7 @@ isort[requirements]==5.7.*
 mongomock==3.22.*
 moto==3.1.16
 mypy==0.790
-pytest==6.2.*
+pytest==7.4.*
 pytest-cov==2.11.*
 pytest-mock==3.5.*
 pytest-vcr==1.0.*