Add Python 3.9 distutils

Author: andrivet

.github/workflows/tests.yml

@@ -24,7 +24,7 @@ jobs:
             python3.6 \
             python3.7 python3.7-distutils \
             python3.8 python3.8-distutils \
-            python3.9 \
+            python3.9 python3.9-distutils \
             python3.10 \
             python3.11 \
             python3.12 \