Merge pull request #180 from mixpanel/zihe-bump-ios-version

bump iOS version to 4.1.0

Author: zihejia

MixpanelReactNative.podspec

@@ -19,5 +19,5 @@ Pod::Spec.new do |s|
   s.pod_target_xcconfig = { 'DEFINES_MODULE' => 'YES' }  
 
   s.dependency "React-Core"
-  s.dependency "Mixpanel-swift", '4.0.5'
+  s.dependency "Mixpanel-swift", '4.1.0'
 end