fix: podspec to support all apple os

Author: hyochan

openiap.podspec

@@ -12,10 +12,10 @@ Pod::Spec.new do |s|
   s.author           = { 'hyodotdev' => 'hyo@hyo.dev' }
   s.source           = { :git => 'https://github.com/hyodotdev/openiap-apple.git', :tag => s.version.to_s }
 
-  s.ios.deployment_target = '13.0'
-  s.osx.deployment_target = '10.15'
+  s.ios.deployment_target = '15.0'
+  s.osx.deployment_target = '14.0'
 
-  s.swift_version = '5.0'
+  s.swift_version = '5.9'
   s.source_files = 'Sources/**/*.swift'
 
   s.frameworks = 'StoreKit'