sdk upgrade

 Pod::Spec.new do |s|
     s.name         = "HHVDoctorSDK"
-    s.version      = "2.0.6.0724.1420"
+    s.version      = "2.0.6.0724.1450"
     s.summary      = "和缓视频医生 SDK"
 
     s.description  = <<-DESC

@@ -3,5 +3,5 @@
 <plist version="1.0">
 <dict>
 	<key>HHBundleVersion</key>
-<string>07:24:14:20</string></dict>
+<string>07:24:14:50</string></dict>
 </plist>

@@ -430,6 +430,7 @@ enum PermissionType : NSInteger;
 /// 视频管理器代理
 SWIFT_PROTOCOL("_TtP12hhVDoctorSDK16HHMVideoDelegate_")
 @protocol HHMVideoDelegate <NSObject>
+@optional
 /// 主动视频时的呼叫状态变化
 /// \param state 当前呼叫状态
 ///