[MacPorts] #42593: Upgrade py-keyring to latest version

[MacPorts]

#42593: Upgrade py-keyring to latest version
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 Reporter:  mail@…  |      Owner:  macports-tickets@…
     Type:  update  |     Status:  new
 Priority:  Normal  |  Milestone:
Component:  ports   |    Version:  2.2.1
 Keywords:          |       Port:  py-keyring
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 The package py-keyring is outdated, the latest version is 3.5

 I modified the Portfile, and it seems to work on my machine with
 python2.7. See the attached diff.

 Additional testing required, especially newer python version (3.x).

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Ticket URL: <https://trac.macports.org/ticket/42593>
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