[MacPorts] #40373: update relax to 3.0.0

[MacPorts]

#40373: update relax to 3.0.0
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 Reporter:  howarth@…  |      Owner:  macports-tickets@…
     Type:  update     |     Status:  new
 Priority:  Normal     |  Milestone:
Component:  ports      |    Version:  2.2.0
 Keywords:             |       Port:  relax
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 The attached Portfile.diff and associated relax-script.patch (to fix a bug
 which is fixed in relax trunk) updates the relax to the 3.0.0 release.
 Tested with 'relax --gui' and 'relax --test-suite' after installation.

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Ticket URL: <https://trac.macports.org/ticket/40373>
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