[BUG] Type 'ReadStream' is not assignable to type 'string | Buffer | ReadableStream<any> | undefined'.

[berke581]

Describe the bug
I get TypeScript error Type 'ReadStream' is not assignable to type 'string | Buffer | ReadableStream<any> | undefined'. when I try the example code in Usage Docs. It works perfectly when I cast createReadStream's return value to any.

To Reproduce
Steps to reproduce the behavior:

1. Using TypeScript
2. const response = await client.upload({ image: createReadStream('/home/kai/dank-meme.jpg'), type: 'stream', });

Expected behavior
It should not give a TypeScript error.

Environment:

• Library version: 2.2.0
• OS: Windows 10
• NodeJS version: 14.18.1