Update IBAnimatable.podspec for please 2.2
Update IBAnimatable.podspec for please 2.2

seanwoodward/IBAnimatable,JakeLin/IBAnimatable,IBAnimatable/IBAnimatable,alexiosdev/IBAnimatable,seanwoodward/IBAnimatable,IBAnimatable/IBAnimatable,alexiosdev/IBAnimatable,IBAnimatable/IBAnimatable,JakeLin/IBAnimatable