[MacPorts] #48322: Update py-powerline to version 2.2 (current port is broken!)

[MacPorts]

#48322: Update py-powerline to version 2.2 (current port is broken!)
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 Reporter:  mdeaudelin@…  |      Owner:  macports-tickets@…
     Type:  defect        |     Status:  new
 Priority:  Normal        |  Milestone:
Component:  ports         |    Version:
 Keywords:                |       Port:  py-powerline
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 The current port of py-powerline is outdated and fails to install with a
 checksum error.

 Proposed fix:
 - Change the source GitHub repository from Lokaltog/powerline to
 powerline/powerline (where all development is now done).
 - Upgrade to the latest stable version (2.2).

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Ticket URL: <https://trac.macports.org/ticket/48322>
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