fix(ios): add ios.deployment_target of 13.0

react-native-readium.podspec

@@ -11,15 +11,14 @@ Pod::Spec.new do |s|
   s.authors      = package["author"]
 
   s.platforms    = { :ios => "13.0" }
-  s.source       = { :git => "http://github.com/5-stones/react-native-readium.git", :tag => "#{s.version}" }
+  s.ios.deployment_target = "13.0"
 
+  s.source       = { :git => "http://github.com/5-stones/react-native-readium.git", :tag => "#{s.version}" }
   s.source_files = "ios/**/*.{h,m,mm,swift}"
 
   s.swift_version = "5.0"
 
   s.dependency "React-Core"
-
-  # this is an issue as these aren't currently published on cocoapods.org
   s.dependency "R2Shared"
   s.dependency "R2Streamer"
   s.dependency "R2Navigator"