update to flutter_webrtc 0.8.3

Author: hiroshihorie

example/pubspec.lock

@@ -173,12 +173,10 @@ packages:
   flutter_webrtc:
     dependency: transitive
     description:
-      path: "."
-      ref: master
-      resolved-ref: "95be5f0090c07d9836daea71a689e0dd3a74c11a"
-      url: "https://github.com/flutter-webrtc/flutter-webrtc"
-    source: git
-    version: "0.8.2"
+      name: flutter_webrtc
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "0.8.3"
   google_fonts:
     dependency: "direct main"
     description:

pubspec.lock

@@ -225,7 +225,7 @@ packages:
       name: flutter_webrtc
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.8.2"
+    version: "0.8.3"
   glob:
     dependency: transitive
     description:

pubspec.yaml

@@ -22,11 +22,7 @@ dependencies:
   uuid: ^3.0.4
   synchronized: ^3.0.0
   protobuf: ^2.0.1
-  flutter_webrtc:
-    git:
-      url: https://github.com/flutter-webrtc/flutter-webrtc
-      ref: master
-
+  flutter_webrtc: ^0.8.3
   dart_webrtc: ^1.0.3
   device_info_plus: ^3.2.1