Bump tox from 3.25.0 to 3.26.0

Bumps [tox](https://github.com/tox-dev/tox) from 3.25.0 to 3.26.0.
- [Release notes](https://github.com/tox-dev/tox/releases)
- [Changelog](https://github.com/tox-dev/tox/blob/master/docs/changelog.rst)
- [Commits](tox-dev/tox@3.25.0...3.26.0)

---
updated-dependencies:
- dependency-name: tox
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

Pipfile

@@ -13,5 +13,5 @@ python-keycloak-client = "==0.2.3"
 
 [dev-packages]
 pylint = "==2.8.2"
-tox = "==3.25.0"
+tox = "==3.26.0"
 tox-pipenv = "==1.10.1"