[MacPorts] #60539: add support for versions to `port bump`

[MacPorts]

#60539: add support for versions to `port bump`
-------------------------+--------------------
 Reporter:  lhaeger      |      Owner:  (none)
     Type:  enhancement  |     Status:  new
 Priority:  Normal       |  Milestone:
Component:  ports        |    Version:  2.6.2
 Keywords:               |       Port:
-------------------------+--------------------
 I regularly check my ports with `port livecheck`, which tells me which
 newer port versions could be built. Then manually edit the port file to
 update the version number, then run `port bump` before trying an install
 and start fixing things, if necessary.

 Would be nice if I could skip the manual editing and directly tell `port
 bump` the new version number, so it not only updates the hashes but the
 version string as well. If I wanted to prepare an update for my-port from
 version 1.0 to 1.1, I could then run `port bump my-port at 1.1`.

 Of course `port bump` would need to understand all alternative ways to set
 a port's version e.g. github.setup .

-- 
Ticket URL: <https://trac.macports.org/ticket/60539>
MacPorts <https://www.macports.org/>
Ports system for macOS