Update react-native-in-app-utils.podspec (chirag04#204)

Fix a pod install error

Author: quarrant

react-native-in-app-utils.podspec

@@ -10,7 +10,7 @@ Pod::Spec.new do |s|
   s.license         = pjson["license"]
   s.author          = { "Chirag Jain" => "[email protected]" }
   s.platform        = :ios, "7.0"
-  s.source          = { :git => "https://github.com/chirag04/react-native-in-app-utils", :tag => "#{s.version}" }
+  s.source          = { :git => "https://github.com/chirag04/react-native-in-app-utils.git", :tag => "v#{s.version}" }
   s.source_files    = 'InAppUtils/*.{h,m}'
 
   s.dependency 'React'