run with GIL disabled

.github/workflows/test.yml

@@ -7,22 +7,13 @@ permissions:
 
 jobs:
   build:
-    strategy:
-      matrix:
-        version: ["3.9", "3.10", "3.11", "3.12"]
     runs-on: ubuntu-latest
     defaults:
       run:
         shell: bash -el {0}
     steps:
     - uses: actions/checkout@v3
-    - name: Set up Python
-      uses: actions/setup-python@v4
-      with:
-        python-version: "${{ matrix.version }}"
-        allow-prereleases: true
-
-    - name: Setup Miniconda
+    - name: Setup Python via Miniconda
       uses: conda-incubator/[email protected]
       with:
         python-version: 3.13
@@ -40,3 +31,5 @@ jobs:
         python python_c_extension/setup.py build
         cp -r build/*/* python_c_extension
         python -m unittest discover tests/ -vvv
+      env:
+        PYTHON_GIL: 0