test github workflow with multiple python versions resolves #11

.github/workflows/python-app.yml

@@ -1,6 +1,3 @@
-# This workflow will install Python dependencies, run tests and lint with a single version of Python
-# For more information see: https://docs.github.com/en/actions/automating-builds-and-tests/building-and-testing-python
-
 name: Python application
 
 on:
@@ -14,32 +11,39 @@ permissions:
 
 jobs:
   build:
-
     runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        python-version: ["3.8", "3.9", "3.10", "3.11", "3.12"]
 
     steps:
-    - uses: actions/checkout@v4
-    - name: Set up Python 3.11
+    - name: Check out code
+      uses: actions/checkout@v4
+
+    - name: Set up Python
       uses: actions/setup-python@v3
       with:
-        python-version: "3.11"
+        python-version: ${{ matrix.python-version }}
+
     - name: Set up Java
       uses: actions/setup-java@v3
       with:
         distribution: 'temurin'
         java-version: '21'  # PlantUML requires Java; set up a compatible Java version.
 
-
     - name: Download latest PlantUML release
       run: |
         # Fetch the latest PlantUML release URL from GitHub API
         curl -L -o plantuml.jar https://github.com/plantuml/plantuml/releases/download/v1.2024.7/plantuml-mit-1.2024.7.jar
+
     - name: Create .env file for PlantUML
       run: |
         echo "PLANTUML_JAR=plantuml.jar" > .env
+
     - name: Install dependencies
       run: |
         python -m pip install uv==0.4.9
+
     - name: Test with pytest
       run: |
         uv run pytest