Update EaseCallKit.podspec

Author: zhangchong-git

EaseCallKit.podspec

@@ -11,7 +11,7 @@ Pod::Spec.new do |s|
     s.source           = { :git => 'https://github.com/easemob/easecallkitui-ios.git', :tag => s.version.to_s }
     s.frameworks = 'UIKit'
     s.libraries = 'stdc++'
-    s.ios.deployment_target = '9.0'
+    s.ios.deployment_target = '10.0'
     s.source_files = 'Classes/**/*.{h,m,strings}'
     s.public_header_files = [
       'Classes/Process/EaseCallManager.h',