This is a major release to signal the end of API v1.1 functions.

Fix a problem withauth_sitrep() not correctly handling old tokens.

Since httr2 > 0.2.3, rtweet refreshes OAuth 2.0 tokens automatically.
It is no longer needed to userrtweet_oauth2(), authentication is fully handled by httr2.

Document the deprecated functions from API v1.1 to API v2: seehelp("rtweet-deprecated", "rtweet").

New functionclient_clean() to remove client's data (together withauth_clean() they leave the user cache empty).