update workflow

.github/workflows/tests.yml

@@ -11,16 +11,16 @@ jobs:
     steps:
       - uses: actions/checkout@v2
 
-      - name: Set up Python 3.9
+      - name: Set up Python 3.12
         uses: actions/setup-python@v2
         with:
-          python-version: '3.9'
+          python-version: '3.12'
           architecture: 'x64'
 
       - name: Install dependencies
         run: |
           python -m pip install --upgrade pip setuptools
-          pip install -r .requirements.txt --pre
+          pip install --pre -r .requirements.txt
 
       - name: Test with pytest
         run: |