Update podspec.
Update podspec.

kiwamunet/PEPhotoCropEditor,mr-v/PEPhotoCropEditor,Adorkable-forkable/PEPhotoCropEditor,KaterinaPetrova/PEPhotoCropEditor,wonderkiln/PEPhotoCropEditor,BluechipSystems/PEPhotoCropEditor,david90/PEPhotoCropEditor,yangmie/PEPhotoCropEditor,imjerrybao/PEPhotoCropEditor,kishikawakatsumi/PEPhotoCropEditor,chicisimo/PEPhotoCropEditor