Next attempt to solve the PyPy/NumPy problem: Use pypy3-dev instead o…

…f pypy-dev

.github/workflows/ci.yml

@@ -22,7 +22,7 @@ jobs:
                   python-version: ${{ matrix.python-version }}
             - name: Install dependencies
               run: |
-                  sudo apt -y install pypy-dev
+                  sudo apt -y install pypy3-dev
                   sudo apt -y install libzbar0
                   pip install -r tests/requirements.txt
                   pip install flake8