Update minimum deployment targets to match recent changes for native WebSocket implementation.

Author: danielrbrowne

PusherSwift.podspec

@@ -15,7 +15,7 @@ Pod::Spec.new do |s|
 
   s.dependency 'ReachabilitySwift', '~> 5.0'
 
-  s.ios.deployment_target = '8.0'
-  s.osx.deployment_target = '10.11'
-  s.tvos.deployment_target = '9.0'
+  s.ios.deployment_target = '13.0'
+  s.osx.deployment_target = '10.15'
+  s.tvos.deployment_target = '13.0'
 end

PusherSwiftWithEncryption.podspec

@@ -16,6 +16,6 @@ Pod::Spec.new do |s|
   s.dependency 'ReachabilitySwift', '~> 5.0'
   s.dependency 'Sodium', '0.8.0'
 
-  s.ios.deployment_target = '8.0'
-  s.osx.deployment_target = '10.11'
+  s.ios.deployment_target = '13.0'
+  s.osx.deployment_target = '10.15'
 end