[MacPorts] #43270: libyaml update to 0.1.6

[MacPorts]

#43270: libyaml update to 0.1.6
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 Reporter:  andrew@…  |      Owner:  macports-tickets@…
     Type:  defect    |     Status:  new
 Priority:  High      |  Milestone:
Component:  ports     |    Version:  2.2.1
 Keywords:  security  |       Port:  libyaml
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 https://www.ruby-lang.org/en/news/2014/03/29/heap-overflow-in-yaml-uri-
 escape-parsing-cve-2014-2525/

 There is a security issue in rails and the linked libyaml.

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Ticket URL: <https://trac.macports.org/ticket/43270>
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