Update podspec before the release
Update podspec before the release

kean/DFImageManager,zhaoguohui/DFImageManager,peterpaulis/DFImageManager,AddAloner/DFImageManager,mohsinalimat/DFImageManager,peterpaulis/DFImageManager,benzhipeng/DFImageManager,holgersindbaek/DFImageManager,vitkovsky/DFImageManager,digal/DFImageManager,benzhipeng/DFImageManager,DABSquared/DFImageManager,JeeLiu/DFImageManager,mohsinalimat/DFImageManager,holgersindbaek/DFImageManager,zht415/DFImageManager,hzm0318hzm/DFImageManager,AddAloner/DFImageManager,arvindhsukumar/DFImageManager,buithuyen/DFImageManager,buithuyen/DFImageManager,ichu501/DFImageManager,digal/DFImageManager,jsooriah/DFImageManager,Adlai-Holler/DFImageManager