Merge pull request #621 from modoboa/add-python-313-314

ci: add python 3.13 and 3.14

Author: tonioo

.github/workflows/installer.yml

@@ -11,7 +11,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: [3.9, '3.10', '3.11', '3.12']
+        python-version: ['3.10', '3.11', '3.12', '3.13', '3.14']
       fail-fast: false
 
     steps: