Install Playwright in GitHub Actions, refs #43

.github/workflows/test.yml

@@ -15,19 +15,20 @@ jobs:
     steps:
     - uses: actions/checkout@v2
     - name: Set up Python ${{ matrix.python-version }}
-      uses: actions/setup-python@v2
+      uses: actions/setup-python@v4
       with:
         python-version: ${{ matrix.python-version }}
-    - uses: actions/cache@v2
-      name: Configure pip caching
+        cache: pip
+        cache-dependency-path: setup.py
+    - name: Cache Playwright browsers
+      uses: actions/cache@v3
       with:
-        path: ~/.cache/pip
-        key: ${{ runner.os }}-pip-${{ hashFiles('**/setup.py') }}
-        restore-keys: |
-          ${{ runner.os }}-pip-
+        path: ~/.cache/ms-playwright/
+        key: ${{ runner.os }}-browsers
     - name: Install dependencies
       run: |
-        pip install -e '.[test]'
+        pip install -e '.[test,playwright]'
+        playwright install
         pip install "datasette${{ matrix.datasette-version }}"
     - name: Run tests
       run: |