chore: use Node.js 18 and 20 in CI (#339)

Author: davidjgoss

.github/workflows/test.yml

@@ -13,14 +13,15 @@ on:
 jobs:
   test:
     runs-on: ubuntu-latest
-
+    strategy:
+      matrix:
+        node-version: [18.x, 20.x]
     steps:
       - name: set git core.autocrlf to 'input'
         run: git config --global core.autocrlf input
       - uses: actions/checkout@v3
       - uses: actions/setup-node@v3
         with:
-          node-version: '16.x'
           cache: 'npm'
           cache-dependency-path: package-lock.json
       - run: npm ci