Update "pyproject.toml" file.

KelSolaar · KelSolaar · commit 9937dee02abf · 2023-01-14T07:17:24.000+13:00
diff --git a/pyproject.toml b/pyproject.toml
@@ -115,6 +115,7 @@ development = [
     "pydocstyle",
     "pytest",
     "pytest-cov",
+    "pytest-xdist",
     "pyupgrade",
     "restructuredtext-lint",
     "sphinx",
