Reproduction for issue: cloudflare/workerd#1298

Steps to reproduce:

1. Clone and npm ci
2. Uncomment line 5 (import { neon } from '@neondatabase/serverless') in src/index.ts
3. Watch as the type errors now appear, or run npx tsc --noEmit to see the errors

When you don't load @types/node, no errors appear. When you do, the errors appear since now Request/Response/fetch global types have been changed.