Update dependency tox to v3.25.0 (#127)

renovate[bot] · renovate-bot · web-flow · commit 2f2f1901dde7 · 2022-04-20T08:22:51.000+01:00
Co-authored-by: Renovate Bot &lt;bot@renovateapp.com&gt;
diff --git a/requirements_dev.txt b/requirements_dev.txt
@@ -3,6 +3,6 @@ coverage==6.3.2
 pip==22.0.4
 pytest==7.1.1
 Sphinx==4.5.0
-tox==3.24.5
+tox==3.25.0
 twine==4.0.0
 wheel==0.37.1
