Search or Get Following/Followers by User ID

[BradKML]

This is one of the features https://github.com/rishi-raj-jain/twitterUsernamefromUserID provides. I would hope that @rishi-raj-jain can help this library out by integrating the username-to-id feature into this library.

Utility:

• some datasets provide a list of users in ID format instead of handles, to prevent heavy name and avatar changes.
• inversely, Scweet currently only scrape usernames by handles, and they are inept in saving data as ID format for stability