message: fix missing .ts
diff: import Client from "../module/client.ts"
  import { RequestMethod } from "../types/fetch.ts"
  -import { Ratelimiter } from './ratelimiter';
  +import { Ratelimiter } from './ratelimiter.ts';
  // type RequestBody = string | Blob | ArrayBufferView | ArrayBuffer | FormData | URLSearchParams | null | undefined
  