feat(iOS): post install script for deployment target (#5783)

* feat: post install script for deployment target

* chore: fix path to helper file

* chore: put post_install in better spot

Co-authored-by: jcesarmobile <jcesarmobile@gmail.com>

ios-template/App/Podfile

@@ -1,3 +1,5 @@
+require_relative '../../node_modules/@capacitor/ios/scripts/pods_helpers'
+
 platform :ios, '13.0'
 use_frameworks!
 
@@ -15,3 +17,7 @@ target 'App' do
   capacitor_pods
   # Add your Pods here
 end
+
+post_install do |installer|
+  assertDeploymentTarget(installer)
+end

ios/scripts/pods_helpers.rb

@@ -0,0 +1,12 @@
+def assertDeploymentTarget(installer)
+  installer.pods_project.targets.each do |target|
+    target.build_configurations.each do |config|
+      # ensure IPHONEOS_DEPLOYMENT_TARGET is at least 13.0
+      deployment_target = config.build_settings['IPHONEOS_DEPLOYMENT_TARGET'].to_f
+      should_upgrade = deployment_target < 13.0 && deployment_target != 0.0
+      if should_upgrade
+        config.build_settings['IPHONEOS_DEPLOYMENT_TARGET'] = '13.0'
+      end
+    end
+  end
+end