fix: add missing type import (#3664)

And generic format type too.

Author: achingbrain

packages/ipfs-http-client/src/types.d.ts

@@ -2,8 +2,9 @@ import { Format as IPLDFormat } from 'interface-ipld-format'
 import { Agent as HttpAgent } from 'http'
 import { Agent as HttpsAgent } from 'https'
 import { Multiaddr } from 'multiaddr'
+import { CodecName } from 'multicodec'
 
-export type LoadFormatFn = (name: CodecName) => Promise<IPLDFormat>
+export type LoadFormatFn = (name: CodecName) => Promise<IPLDFormat<any>>
 
 export interface Options {
   host?: string