Merge pull request #549 from FormidableLabs/chore/update-app-auth-ios

Upgrade AppAuth-iOS to v1.4.0

Author: Kadi Kraman

react-native-app-auth.podspec

@@ -14,5 +14,5 @@ Pod::Spec.new do |s|
   s.source_files  = 'ios/**/*.{h,m}'
   s.requires_arc = true
   s.dependency 'React'
-  s.dependency 'AppAuth', '1.2.0'
+  s.dependency 'AppAuth', '1.4.0'
 end