upgrade flutter-webrtc to 0.5.8.

cloudwebrtc · cloudwebrtc · commit a81631d87682 · 2021-02-03T16:18:48.000+08:00
diff --git a/pubspec.yaml b/pubspec.yaml
@@ -8,7 +8,7 @@ environment:
 
 dependencies:
   crypto: ^2.1.2
-  flutter_webrtc: ^0.5.7
+  flutter_webrtc: ^0.5.8
   intl: any
   logger: ^0.9.0
   parser_error: ^0.1.1
