ci: update node-version matrix

Author: idleberg

.github/workflows/nodejs.yml

@@ -27,7 +27,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        node-version: ["18", "20", "22", "24"]
+        node-version: ["20", "22", "24"]
         os: ["macos-latest", "ubuntu-latest", "windows-latest"]
 
     steps: