update podspec.
update podspec.

betallcoffee/PLPlayerKit,betallcoffee/PLPlayerKit,hzwangsiyu/PLPlayerKit,hzwangsiyu/PLPlayerKit,hzwangsiyu/PLPlayerKit,pili-engineering/PLPlayerKit,pili-engineering/PLPlayerKit,hzwangsiyu/PLPlayerKit,betallcoffee/PLPlayerKit,pili-engineering/PLPlayerKit