Bump streamlit-webrtc from 0.7.2 to 0.8.0

Bumps [streamlit-webrtc](https://github.com/whitphx/streamlit-webrtc) from 0.7.2 to 0.8.0.
- [Release notes](https://github.com/whitphx/streamlit-webrtc/releases)
- [Changelog](https://github.com/whitphx/streamlit-webrtc/blob/master/CHANGELOG.md)
- [Commits](https://github.com/whitphx/streamlit-webrtc/compare/v0.7.2...v0.8.0)

Signed-off-by: dependabot[bot] <support@github.com>

requirements.txt

@@ -3,5 +3,5 @@ av==8.0.3
 numpy==1.20.2
 opencv_python==4.5.1.48
 streamlit==0.80.0
-streamlit_webrtc==0.7.2
+streamlit_webrtc==0.8.0
 typing_extensions==3.7.4.3