New Features / Improvements

• Add support for Bookmarks with Twitter API v2 (#1848)
  • Add Client.remove_bookmark, Client.get_bookmarks, Client.bookmark
• Add support for using OAuth 2.0 Authorization Code Flow with Client methods that require the authenticating user's ID (0157d0b)
  • Raise TypeError for those methods when the access token isn't set
• Raise NotFound rather than HTTPException when encountering 404 response status codes in BaseClient.request (b6b8219)