python -m pip install matplotlib>=3.4.2

Author: cclauss

.github/workflows/build.yml

@@ -20,6 +20,7 @@ jobs:
       - name: Install dependencies
         run: |
           python -m pip install --upgrade pip setuptools six wheel
+          python -m pip install matplotlib>=3.4.2
           python -m pip install mypy pytest-cov -r requirements.txt
       - run: mypy .
       - name: Run tests