ruff --target-version=py38

Author: cclauss

.github/workflows/tests.yml

@@ -13,7 +13,8 @@ jobs:
     steps:
     - uses: actions/checkout@v3
     - run: pip install --user ruff
-    - run: ruff --format=github --select="E,F,PLC,PLE,UP,W,YTT" --ignore="PLC1901,S101,UP031" --target-version=py37 .
+    - run: ruff --format=github --select="E,F,PLC,PLE,UP,W,YTT"
+                --ignore="PLC1901,S101,UP031" --target-version=py38 .
   Tests:
     strategy:
       fail-fast: false