ci: test coincurve against latest Python version

Author: darosior

.github/workflows/python-package.yml

@@ -59,11 +59,11 @@ jobs:
     - name: Set up Python 3.10
       uses: actions/setup-python@v2
       with:
-        python-version: '3.10'
+        python-version: 3.12
     - name: Testing with Coincurve ${{ matrix.coincurve-version }}
       run: |
         python -m pip install --upgrade pip
-        pip install pytest
-        pip install -r requirements.txt -r tests/requirements.txt
+        pip install setuptools
+        pip install -r tests/requirements.txt
         pip install -I coincurve==${{ matrix.coincurve-version }}
         python setup.py install