[MacPorts] #53564: textmate2: update to 2.0-rc.4

[MacPorts]

#53564: textmate2: update to 2.0-rc.4
----------------------+------------------------
 Reporter:  lpsinger  |      Owner:  neverpanic
     Type:  update    |     Status:  new
 Priority:  Normal    |  Milestone:
Component:  ports     |    Version:
 Keywords:            |       Port:  textmate2
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 textmate2 is pestering me about updates when I launch it. Indeed, a new
 version is available:

 {{{
 $ port livecheck textmate2
 textmate2 seems to have been updated (port version: 2.0-beta.12.4, new
 version: 2.0-rc.4)
 }}}

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Ticket URL: <https://trac.macports.org/ticket/53564>
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