ci: add node v18

Author: snitin315

.github/workflows/nodejs.yml

@@ -59,7 +59,7 @@ jobs:
  strategy:
  matrix:
  os: [ubuntu-latest, windows-latest, macos-latest]
- node-version: [12.x, 14.x, 16.x, 17.x]
+ node-version: [12.x, 14.x, 16.x, 17.x, 18.x]
  webpack-version: [latest]
  include:
  - node-version: 16.x