WIP: Do not merge -- Test on Python 3.10 beta 1

https://www.python.org/download/pre-releases/

Author: cclauss

.github/workflows/build.yml

@@ -12,14 +12,17 @@ jobs:
       - uses: actions/checkout@v2
       - uses: actions/setup-python@v2
         with:
-          python-version: "3.9"
+          python-version: "3.10"
       - uses: actions/cache@v2
         with:
           path: ~/.cache/pip
           key: ${{ runner.os }}-pip-${{ hashFiles('requirements.txt') }}
       - name: Install dependencies
         run: |
           python -m pip install --upgrade pip setuptools six wheel
+          # sudo apt-get install libxml2 libxslt
+          sudo snap install libxml2 libxslt
+          python -m pip install matplotlib>=3.4.2
           python -m pip install mypy pytest-cov -r requirements.txt
       - run: mypy --install-types --non-interactive .
       - name: Run tests

.github/workflows/directory_writer.yml

@@ -8,6 +8,8 @@ jobs:
     steps:
       - uses: actions/checkout@v1  # v1, NOT v2
       - uses: actions/setup-python@v2
+        with:
+          python-version: "3.10"
       - name: Write DIRECTORY.md
         run: |
           scripts/build_directory_md.py 2>&1 | tee DIRECTORY.md