examples: webrtc: Update to gstreamer-rs 0.19 release
Also update the macOS workaround for gstreamer-gl requiring a
NSRunLoop
/ NSApp
on the main thread, and update from strucopt to
clap 4.
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Also update the macOS workaround for gstreamer-gl requiring a
NSRunLoop
/ NSApp
on the main thread, and update from strucopt to
clap 4.