[MacPorts] #39087: py-pip: Update to 1.3.1

[MacPorts]

#39087: py-pip: Update to 1.3.1
----------------------------+--------------------------------
 Reporter:  leone.parise@…  |      Owner:  macports-tickets@…
     Type:  request         |     Status:  new
 Priority:  Normal          |  Milestone:
Component:  ports           |    Version:  2.1.3
 Keywords:                  |       Port:
----------------------------+--------------------------------
 Pump version of '''py-pip''' to '''1.3.1'''.

-- 
Ticket URL: <https://trac.macports.org/ticket/39087>
MacPorts <http://www.macports.org/>
Ports system for OS X