Increases minimum deployment target to iOS 9.0

Author: ashfurrow

Changelog.md

@@ -10,6 +10,7 @@ Current master
 -----
 
 - Adds support for RxSwift 6 - [@jinsu3758](https://github.com/jinsu3758)
+- Increases minimum deployment target to iOS 9.0 - [@ashfurrow](https://github.com/ashfurrow)
 
 5.1.1
 -----

NSObject+Rx.podspec

@@ -10,7 +10,7 @@ Pod::Spec.new do |s|
   s.author             = { "Ash Furrow" => "ash@ashfurrow.com" }
   s.social_media_url   = "http://twitter.com/ashfurrow"
 
-  s.ios.deployment_target = '8.0'
+  s.ios.deployment_target = '9.0'
   s.osx.deployment_target = '10.10'
   s.watchos.deployment_target = '3.0'
   s.tvos.deployment_target = '9.0'