Drop 3.8/3.9 from CI

Author: jenshnielsen

.github/workflows/python-app.yml

@@ -13,7 +13,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: ["3.8", "3.9", "3.10", "3.11", "3.12", "3.13"]
+        python-version: ["3.10", "3.11", "3.12", "3.13"]
     env:
       DISPLAY: ':99.0'
 

.github/workflows/python-release.yml

@@ -15,7 +15,7 @@ jobs:
     - name: Set up Python
       uses: actions/setup-python@v5.3.0
       with:
-        python-version: '3.9'
+        python-version: '3.12'
     - uses: ./.github/actions/install-dependencies-and-plottr
     - name: Install build deps
       run: pip install --upgrade build