Add support for canvas v3

For now, we support both v2 and v3, since they both seem to work. We'd prefer to only support one major version for ease of maintenance, but currently v3 is in the RC stage, and v2 doesn't work with the latest versions of Node.js, so this seems worthwhile until v3 graduates to a full release.

Closes #3795.

.github/workflows/jsdom-ci.yml

@@ -29,21 +29,29 @@ jobs:
     env:
       TEST_SUITE: 'node-canvas'
     runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          - node-version: '20'
+            canvas-version: '^2.11.2'
+          - node-version: '22'
+            canvas-version: '^3.0.0-rc3'
     steps:
       - uses: actions/checkout@v4
         with:
           submodules: 'recursive'
       - uses: actions/setup-node@v4
         with:
-          node-version: '20'
+          node-version: ${{ matrix.node-version }}
       - name: Install required image manipulation packages with APT
         run: sudo apt-get install build-essential libcairo2-dev libpango1.0-dev libjpeg-dev libgif-dev librsvg2-dev
       - name: Setup HOSTS file for Web Platform Test server
         run: ./test/web-platform-tests/tests/wpt make-hosts-file | sudo tee -a /etc/hosts
       - name: Install dependencies
-        run: npm ci
+        run: npm ci && npm install canvas@${{ matrix.canvas-version }}
       - name: Run tests
-        run: npm install canvas && npm test -- --retries 1
+        run: npm test -- --retries 1
   build:
     name: Tests
     runs-on: ubuntu-latest

package.json

@@ -46,7 +46,7 @@
     "xml-name-validator": "^5.0.0"
   },
   "peerDependencies": {
-    "canvas": "^2.11.2"
+    "canvas": "^2.11.2 || ^3.0.0-rc3"
   },
   "peerDependenciesMeta": {
     "canvas": {