Drop Node 18 from CI run

Author: jdalton

.github/workflows/test.yml

@@ -25,5 +25,5 @@ jobs:
     with:
       no-lockfile: true
       npm-test-script: 'test-ci'
-      node-versions: '18,20,22,23'
+      node-versions: '20,22,23'
       os: 'ubuntu-latest,windows-latest'