ci: add Node.js v20 (#1515)

Author: snitin315

.github/workflows/nodejs.yml

@@ -65,7 +65,7 @@ jobs:
  strategy:
  matrix:
  os: [ubuntu-latest, windows-latest, macos-latest]
- node-version: [14.x, 16.x, 18.x, 19.x]
+ node-version: [14.x, 16.x, 18.x, 20.x]
  webpack-version: [latest]
 
  runs-on: ${{ matrix.os }}