Update to parallelize tests with pytest-xdist. (#6)

Author: pedantic-curmudgeon

dev-requirements.txt

@@ -5,3 +5,4 @@ pre-commit==3.3.3
 pydocstyle==6.3.0
 pylint==2.17.4
 pytest==7.4.0
+pytest-xdist[psutil]==3.3.1

tests/run_pytest.py

@@ -10,7 +10,9 @@ def run_pytest() -> int:
     return run(
         args=(
             "pytest",
-            "--verbose",
+            "--numprocesses=auto",
+            "--durations=0",
+            "--verbosity=2",
             Path(__file__).resolve().parent,
         ),
         check=False,