[MacPorts] #39453: py-flask: update to 0.10.1

[MacPorts]

#39453: py-flask: update to 0.10.1
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 Reporter:  aronnax@…  |      Owner:  ryandesign
     Type:  update     |     Status:  new
 Priority:  Normal     |  Milestone:
Component:  ports      |    Version:  2.1.3
 Keywords:             |       Port:  py-flask
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 Flask 0.10.1 is available. The attached diff updates py-flask, bringing in
 a new dependency on itsdangerous. A Portfile for itsdangerous is also
 attached.

 I also added setuptools as a build dependency.

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Ticket URL: <https://trac.macports.org/ticket/39453>
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