chore: just support node.js v18

Author: kelp404

.github/workflows/test.yml

@@ -12,7 +12,7 @@ jobs:
     strategy:
       max-parallel: 1
       matrix:
-        node-version: [16.x, 18.x]
+        node-version: [18.x]
     steps:
       - uses: actions/checkout@v2
       - uses: actions/setup-node@v2