allow to configure from DCACCOUNT URIs and update to use new transpor…

…t API instead of deprecated rpc.configure()

update dep: deltachat2>=0.8.0

add BotCli.is_admin()

rename qr command to link and don't print qr

fix invite URL printing: now core returns the invite URL

fix bug in _list_cmd()

fix bug in init_cmd

upgrade to deltachat2 v0.5.0 and add BotCli.after()

update example

remove unused import