fix(ios): minimal iOS version support (#243)

Author: newyankeecodeshop

react-native-viewpager.podspec

@@ -11,7 +11,7 @@ Pod::Spec.new do |s|
   s.authors      = package['author']
   s.homepage     = package['homepage']
 
-  s.platform     = :ios, "7.0"
+  s.platform     = :ios, "9.0"
   s.source       = { :git => "https://github.com/react-native-community/react-native-viewpager.git", :tag => "v#{s.version}" }
   s.source_files  = "ios/**/*.{h,m}"
   s.requires_arc = true