Try to run cython tests with different versions

Co-authored-by: Spencer Brown <spencerb21@live.com>

Author: CoolCat467

.github/workflows/ci.yml

@@ -203,7 +203,15 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python: ['3.9', '3.12']
+        include:
+          - python: '3.9'
+            cython: '2'
+          - python: '3.9'
+            cython: '3'
+          - python: '3.11'
+            cython: '2'
+          - python: '3.13'
+            cython: '3'
     steps:
       - name: Checkout
         uses: actions/checkout@v4
@@ -216,18 +224,16 @@ jobs:
       - name: install trio and setuptools
         run: python -m pip install --upgrade pip . setuptools
 
-      - name: install cython<3
-        run: python -m pip install "cython<3"
-      - name: compile pyx file
-        run: cythonize -i tests/cython/test_cython.pyx
-      - name: import & run module
-        run: python -c 'import tests.cython.test_cython'
+      - name: install cython & compile pyx file
+        run: |
+          if [ "${{ matrix.cython }}" == "2" ]; then
+            python -m pip install "cython<3"
+            cythonize -i tests/cython/test_cython.pyx
+          elif [ "${{ matrix.cython }}" == "3" ]; then
+            python -m pip install "cython>=3"
+            cythonize --inplace tests/cython/test_cython.pyx
+          fi
 
-      - name: install cython>=3
-        run: python -m pip install "cython>=3"
-      - name: compile pyx file
-        # different cython version should trigger a re-compile, but --force just in case
-        run: cythonize --inplace --force tests/cython/test_cython.pyx
       - name: import & run module
         run: python -c 'import tests.cython.test_cython'