ci(tox): Remove pytest pin for common tests

Author: szokeasaurusrex

tox.ini

@@ -291,11 +291,7 @@ deps =
     # === Common ===
     py3.8-common: hypothesis
     common: pytest-asyncio
-    # See https://github.com/pytest-dev/pytest/issues/9621
-    # and https://github.com/pytest-dev/pytest-forked/issues/67
-    # for justification of the upper bound on pytest
-    {py3.6,py3.7,py3.8,py3.9,py3.10,py3.11,py3.12}-common: pytest<7.0.0
-    py3.13-common: pytest
+    common: pytest
 
     # === Gevent ===
     {py3.6,py3.7,py3.8,py3.9,py3.10,py3.11}-gevent: gevent>=22.10.0, <22.11.0