fix: drop 18.x

Author: tkskto

.github/workflows/ci.yml

@@ -13,7 +13,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-            node-version: [18.x, 20.x, 22.x]
+            node-version: [20.x, 22.x, 24.x]
 
     steps:
     - uses: actions/checkout@v4