feat(ci): add nodejs 18.x for testing

Author: gnikit

.github/workflows/main.yaml

@@ -5,7 +5,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        node-version: [14.x, 16.x]
+        node-version: [14.x, 16.x, 18.x]
       fail-fast: false
     steps:
       - uses: actions/checkout@v3