[MacPorts] #53920: Please update re2c to 0.16

[MacPorts]

#53920: Please update re2c to 0.16
----------------------+------------------
 Reporter:  pmetzger  |      Owner:
     Type:  defect    |     Status:  new
 Priority:  Normal    |  Milestone:
Component:  ports     |    Version:
 Keywords:  haspatch  |       Port:  re2c
----------------------+------------------
 Please update re2c to 0.16. Rather than including a patch for the
 Portfile, since too many lines changed, I've just attached an entirely new
 Portfile.

--
Ticket URL: <https://trac.macports.org/ticket/53920>
MacPorts <https://www.macports.org/>
Ports system for macOS