Update node version for tests and add dev branch for PRs.

.github/workflows/tests.yml

@@ -3,15 +3,15 @@ on:
   push:
     branches: [main, dev]
   pull_request:
-    branches: [main]
+    branches: [main, dev]
 jobs:
   test:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v3
       - uses: actions/setup-node@v3
         with:
-          node-version: 18
+          node-version: 20
       - name: Install dependencies
         run: npm ci
       - name: Install Playwright Browsers