Bump pytest from 6.2.5 to 7.0.0

Bumps [pytest](https://github.com/pytest-dev/pytest) from 6.2.5 to 7.0.0.
- [Release notes](https://github.com/pytest-dev/pytest/releases)
- [Changelog](https://github.com/pytest-dev/pytest/blob/main/CHANGELOG.rst)
- [Commits](https://github.com/pytest-dev/pytest/compare/6.2.5...7.0.0)

---
updated-dependencies:
- dependency-name: pytest
  dependency-type: direct:development
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

requirements-dev.txt

@@ -44,7 +44,7 @@ pyflakes==2.4.0
     # via flake8
 pyparsing==2.4.7
     # via packaging
-pytest==6.2.5
+pytest==7.0.0
     # via -r requirements-dev.in
 six==1.15.0
     # via
@@ -53,9 +53,9 @@ six==1.15.0
 sqlparse==0.4.2
     # via django
 toml==0.10.2
-    # via
-    #   pytest
-    #   tox
+    # via tox
+tomli==2.0.0
+    # via pytest
 tox==3.24.5
     # via -r requirements-dev.in
 virtualenv==20.4.3