Bump pytest, pytest-cov versions

Author: amorison

tox.ini

@@ -12,8 +12,8 @@ isolated_build = True
 
 [testenv]
 deps =
-    pytest>=7.4
-    pytest-cov>=4.1
+    pytest>=8.1.1
+    pytest-cov>=5.0
 commands =
     stagpy version
     pytest --cov={envsitepackagesdir}/stagpy --cov-report term-missing {posargs}