Update podspec.
Update podspec.

ReactKit/SwiftTask,luzefeng/SwiftTask,ReactKit/SwiftTask,msdgwzhy6/SwiftTask,iosyoujian/SwiftTask,luzefeng/SwiftTask,marinehero/SwiftTask,luzefeng/SwiftTask,marinehero/SwiftTask,luzefeng/SwiftTask,iosyoujian/SwiftTask,iosyoujian/SwiftTask,msdgwzhy6/SwiftTask,msdgwzhy6/SwiftTask,iosyoujian/SwiftTask,ReactKit/SwiftTask,marinehero/SwiftTask,msdgwzhy6/SwiftTask,marinehero/SwiftTask