fix podspec
fix podspec

adrianha/SAParallaxViewControllerSwift,adrianha/SAParallaxViewControllerSwift,bonninf/SAParallaxViewControllerSwift,szk-atmosphere/SAParallaxViewControllerSwift,szk-atmosphere/SAParallaxViewControllerSwift,bonninf/SAParallaxViewControllerSwift,szk-atmosphere/SAParallaxViewControllerSwift,dinhchitrung/SAParallaxViewControllerSwift,adrianha/SAParallaxViewControllerSwift,adrianha/SAParallaxViewControllerSwift,dinhchitrung/SAParallaxViewControllerSwift,dinhchitrung/SAParallaxViewControllerSwift,dinhchitrung/SAParallaxViewControllerSwift