[MacPorts] #55486: textmate2: Update to 2.0-rc.7

[MacPorts]

#55486: textmate2: Update to 2.0-rc.7
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 Reporter:  ryandesign  |      Owner:  neverpanic
     Type:  update      |     Status:  new
 Priority:  Normal      |  Milestone:
Component:  ports       |    Version:
 Keywords:              |       Port:  textmate2
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 Looks like textmate2 version 2.0-rc.7 is available; please update.
 Livecheck may need to be adjusted as it does not find this version, but
 it's there in the GitHub releases.

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Ticket URL: <https://trac.macports.org/ticket/55486>
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