chore (ci): add node v20 to build matrix

Author: alxndrsn

.github/workflows/ci.yml

@@ -35,7 +35,7 @@ jobs:
         options: --health-cmd pg_isready --health-interval 10s --health-timeout 5s --health-retries 5
     strategy:
       matrix:
-        node: ['10', '12', '14', '16', '18']
+        node: ['10', '12', '14', '16', '18', '20']
         os: [ubuntu-latest, windows-latest, macos-latest]
     name: Node.js ${{ matrix.node }} (${{ matrix.os }})
     env: