chore: remove Node 18 (#2274)

Author: drwpow

.github/workflows/ci.yml

@@ -26,7 +26,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        node-version: [18, 20, 22]
+        node-version: [20, 22]
     steps:
       - uses: actions/checkout@v4
       - uses: actions/setup-node@v4