[MacPorts] #68039: difftastic: update port to 0.51.1 (was: difftastic: update port to 0.51)

[MacPorts]

#68039: difftastic: update port to 0.51.1
-------------------------+-------------------------
  Reporter:  sierkb      |      Owner:  herbygillot
      Type:  update      |     Status:  assigned
  Priority:  Normal      |  Milestone:
 Component:  ports       |    Version:  2.8.1
Resolution:              |   Keywords:
      Port:  difftastic  |
-------------------------+-------------------------
Description changed by sierkb:

Old description:

> Please update the difftastic port to the latest upstream version, which
> is 0.51 as of
> https://github.com/Wilfred/difftastic/releases resp.
> https://github.com/Wilfred/difftastic/blob/master/CHANGELOG.md

New description:

 Please update the difftastic port to the latest upstream version, which is
 0.51.1 as of
 https://github.com/Wilfred/difftastic/releases resp.
 https://github.com/Wilfred/difftastic/blob/master/CHANGELOG.md

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Ticket URL: <https://trac.macports.org/ticket/68039#comment:1>
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