Replace pytest-parallel with pytest-xdist

.github/workflows/tests.yml

@@ -71,7 +71,7 @@ jobs:
 
     - name: Run tests
       run: |
-        python -m pytest --workers auto
+        python -m pytest -n auto
         python -m coverage html
 
     - name: Upload code coverage

requirements-dev.txt

@@ -8,7 +8,7 @@ pandas-stubs>=2.2.2.240805
 pandas>=2.2.2
 py==1.11.0
 pytest-cov==5.0.0
-pytest-parallel==0.1.1
+pytest-xdist==3.8.0
 pytest==8.3.2
 setuptools>=78.1.1
 types-Pillow==10.2.0.20240520