update sdk to 3.4.2

Author: xianing

iOS/Podfile

@@ -6,12 +6,12 @@ target 'APIExample' do
   use_frameworks!
   pod 'Floaty', '~> 4.2.0'  
   pod 'AGEVideoLayout', '~> 1.0.2'
-  pod 'AgoraRtcEngine_iOS', '3.4.0'
+  pod 'AgoraRtcEngine_iOS', '3.4.2'
   pod 'AgoraMediaPlayer_iOS', '1.2.2'
 end
 
 target 'Agora-ScreenShare-Extension' do
 
   use_frameworks!
-  pod 'AgoraRtcEngine_iOS', '3.4.0'
+  pod 'AgoraRtcEngine_iOS', '3.4.2'
 end

macOS/Podfile

@@ -7,7 +7,7 @@ target 'APIExample' do
 
   # Pods for APIExample
   pod 'AGEVideoLayout', '~> 1.0.2'
-  pod 'AgoraRtcEngine_macOS', '3.4.0'
+  pod 'AgoraRtcEngine_macOS', '3.4.2'
 
   target 'APIExampleTests' do
     inherit! :search_paths

windows/APIExample/install.ps1

@@ -1,6 +1,6 @@
 $ThirdPartysrc = 'https://agora-adc-artifacts.oss-cn-beijing.aliyuncs.com/libs/ThirdParty.zip'
 $ThirdPartydes = 'ThirdParty.zip'
-$agora_sdk = 'https://download.agora.io/sdk/release/Agora_Native_SDK_for_Windows_v3_4_0_FULL.zip'
+$agora_sdk = 'https://download.agora.io/sdk/release/Agora_Native_SDK_for_Windows_v3_4_2_FULL.zip'
 $agora_des = 'Agora_Native_SDK_for_Windows.zip'
 $MediaPlayerSDK = 'https://download.agora.io/sdk/release/Agora_Media_Player_for_Windows_x86_32597_20200923_2306.zip'
 $MediaPlayerDes = 'MediaPlayerPartSave.zip'