Video SDK 3.4.3 Release

v3.4.3 was released on June 16, 2021. This release fixed the following issues:

The missing nonnull and _Nullable modifiers in Objective-C header files caused warnings when you run the project.
The startAudioMixing method could not play the MP3 local music files with the .m4a filename extension.
After a user of the SDK v3.0.0+ left a communication channel that had any user of the SDK versions earlier than 3.0.0 and switched the channel profile to live streaming, the user of the SDK v3.0.0+ set user role to host before joining the next channel, but the client role setting did not take effect.
Under certain circumstances, an audio delay occasionally occurred 10 minutes after a user joined the channel.

iOS SDK 3.3.0 Release

typo fix