HEADS UP: python-tornado updated to 6

[Miro Hrončok]

Hey,

I've just built updated tornado in rawhide. It is big update (5 to 6).

See https://www.tornadoweb.org/en/stable/releases/v6.0.0.html

Highlights:

* no more Python 2
  * deprecated APIs removed

Report any problems to https://bugzilla.redhat.com/show_bug.cgi?id=1600318