Update pytest.yml with new Python versions

.github/workflows/pytest.yml

@@ -1,30 +1,21 @@
 name: Python package
 
-on:
-    push:
-        branches: [ main ]
-    pull_request:
-        branches: [ main ]
+on: [push]
 
 jobs:
-    build:
+  build:
 
-        runs-on: ubuntu-latest
-        strategy:
-            matrix:
-                python-version: [3.7, 3.8, 3.9]
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        python-version: ["pypy3.9", "pypy3.10", "3.9", "3.10", "3.11", "3.12"]
 
-        steps:
-        - uses: actions/checkout@v2
-        - name: Set up Python ${{ matrix.python-version }}
-            uses: actions/setup-python@v2
-            with:
-                python-version: ${{ matrix.python-version }}
-        - name: Install dependencies
-            run: |
-                python -m pip install --upgrade pip
-                pip install .
-                pip install pytest
-        - name: Test with pytest
-            run: |
-                pytest
+    steps:
+      - uses: actions/checkout@v4
+      - name: Set up Python ${{ matrix.python-version }}
+        uses: actions/setup-python@v4
+        with:
+          python-version: ${{ matrix.python-version }}
+      # You can test your matrix by printing the current Python version
+      - name: Display Python version
+        run: python -c "import sys; print(sys.version)"