Add warnings filter for disutils deprecation

Deprecated in 3.10, scheduled for removal in 3.12

Author: nicoddemus

pyproject.toml

@@ -26,6 +26,8 @@ filterwarnings = [
     # produced by older pyparsing<=2.2.0.
     "default:Using or importing the ABCs:DeprecationWarning:pyparsing.*",
     "default:the imp module is deprecated in favour of importlib:DeprecationWarning:nose.*",
+    # distutils is deprecated in 3.10, scheduled for removal in 3.12
+    "ignore:The distutils package is deprecated:DeprecationWarning",
     # produced by python3.6/site.py itself (3.6.7 on Travis, could not trigger it with 3.6.8)."
     "ignore:.*U.*mode is deprecated:DeprecationWarning:(?!(pytest|_pytest))",
     # produced by pytest-xdist