try with py39

Author: hauntsaninja

.github/workflows/test.yml

@@ -94,8 +94,8 @@ jobs:
           os: macos-13
           toxenv: py
           tox_extra_args: "-n 3 mypyc/test/test_run.py mypyc/test/test_external.py"
-        - name: mypyc runtime tests with py38-debug-build-ubuntu
-          python: '3.8.17'
+        - name: mypyc runtime tests with py39-debug-build-ubuntu
+          python: '3.9.18'
           arch: x64
           os: ubuntu-latest
           toxenv: py