podspec update for v2.2.0
podspec update for v2.2.0

BirdCage-AU/LLSimpleCamera,omergul123/LLSimpleCamera,lisbakke/LLSimpleCamera,leonereveel/LLSimpleCamera,csjlengxiang/LLSimpleCamera,swissmanu/LLSimpleCamera,ywzw2013/LLSimpleCamera,Adorkable-forkable/LLSimpleCamera,JustineKay/LLSimpleCamera,protosphere/LLSimpleCamera,xswm1123/LLSimpleCamera,hapiben/llsimplecamera,SergioChan/LLSimpleCamera