IOS build changes

ios/Podfile

@@ -1,4 +1,4 @@
-platform :ios, '15.5'
+platform :ios, '16.4'
 
 ENV['COCOAPODS_DISABLE_STATS'] = 'true'
 
@@ -32,5 +32,8 @@ end
 post_install do |installer|
   installer.pods_project.targets.each do |target|
     flutter_additional_ios_build_settings(target)
+    target.build_configurations.each do |config|
+      config.build_settings['IPHONEOS_DEPLOYMENT_TARGET'] = '16.4'
+    end
   end
 end