Release Version 0.6.0

Hello and welcome to this latest release of `cnf`!

This release updates the built-in `dnf` provider to properly handle DNF5, which has replaced the
DNF4 package manager on Fedora distributions a while ago (See !59). Also included you will find a
bug fix that previously caused a crash when calling `cnf --debug` without further arguments (See
!61).

As you may have noticed, development was stalled for the past 14 months but I'm slowly starting to
pick up where I left off. As part of this undertaking, I've been hard at work to modernize and
reorganize the entire project repository (See !60 and !62). If you're only using the `cnf` binary,
this is probably irrelevant to you. If you've been using the `cnf` library, however, I recommend you
read the linked merge requests as they explain the future situation of the library crate.

I'm hoping to put together a road map in the next days that will outline which changes I have
planned for the near to midterm future. As the code has been dormant for a long time, most of that
will include refactorings of vast parts of the code. See you in the next release!

Happy hacking!