[paypal][rest] require stable version of sdk.
[paypal][rest] require stable version of sdk.

Payum/Payum,StoreFactory/Payum,formapro-forks/Payum,StoreFactory/Payum,formapro-forks/Payum,Payum/Payum,fullpipe/Payum,StoreFactory/Payum,fullpipe/Payum