update example project iOS project files

example/ios/Podfile

@@ -37,5 +37,11 @@ end
 post_install do |installer|
   installer.pods_project.targets.each do |target|
     flutter_additional_ios_build_settings(target)
+      target.build_configurations.each do |config|
+        target.build_settings(config.name)['CLANG_ALLOW_NON_MODULAR_INCLUDES_IN_FRAMEWORK_MODULES'] = 'YES'
+      end
+  end
+  installer.pods_project.build_configuration_list.build_configurations.each do |configuration|
+    configuration.build_settings['CLANG_ALLOW_NON_MODULAR_INCLUDES_IN_FRAMEWORK_MODULES'] = 'YES'
   end
 end