Incorrect typescript typings for 'Mux.JWT.sign()'

[muxinc]

Incorrect typescript typings for 'Mux.JWT.sign()'

[dylanjha]

this was closed in #69 and released in v3.0.3 - see changelog: https://github.com/muxinc/mux-node-sdk/blob/master/CHANGELOG.md

[MBrendel]

Thanks for merging the PR!

Unfortunately I missed in my previous change, that the type parameter is optional as well.

This PR #72 fixes this and makes the 'type' type stronger too.

export declare interface JWTOptions {
  type?: 'video' | 'thumbnail' | 'gif';
  keyId?: string;
  keySecret?: string;
  expiration?: string;
  params?: any;
}