planemo test 3.8 minimal version

Author: WardDeb

.github/workflows/planemo.yml

@@ -49,7 +49,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: ['3.7', '3.11']
+        python-version: ['3.8', '3.11']
     steps:
     - uses: actions/download-artifact@v3
       with: