tvOS podspec support

allows to use spring scroll view module on tvOS platform

Author: lukebars

src/ios/RNSpringScrollView.podspec

@@ -9,7 +9,7 @@ Pod::Spec.new do |s|
  s.homepage = "https://github.com/bolan9999/react-native-spring-scrollview"
  s.license = package["license"]
  s.author = { "bolan9999" => "shanshang130@gmail.com" }
- s.platform  = :ios, "7.0"
+ s.platforms = { :ios => "7.0", :tvos => "9.0" }
  s.source = { :git => "https://github.com/bolan9999/react-native-spring-scrollview.git", :tag => s.version }
  s.source_files = "SpringScrollView/**/*.{h,m}"
  s.requires_arc = true