install cairo

Author: felix-ht

.github/workflows/python-testing.yml

@@ -24,6 +24,7 @@ jobs:
         run: pipx install poetry
       - name: Install dependencies
         run: |
+          sudo apt-get install -y libcairo2-dev pkg-config python3-dev
           poetry env use python${{ matrix.python-version }}
           poetry install
       - name: Lint with flake8