test on github supported node versions

Author: mohlsen

.github/workflows/validation.yml

@@ -11,7 +11,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        node-version: [14.x, 16.x, 18.x, 20.x]
+        node-version: [20.x, 22.x]
 
     steps:
     - uses: actions/checkout@v3