ci(pull-request): add Node 20 to test runs (#266)

Author: naorpeled

.github/workflows/pull-request.yml

@@ -8,7 +8,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        node: [14, 16, 18]
+        node: [14, 16, 18, 20]
     name: Node ${{ matrix.node }}
     steps:
       - name: 'Checkout latest code'