update dependency

example/pubspec.lock

@@ -281,7 +281,7 @@ packages:
       name: platform
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "3.0.2"
+    version: "3.1.0"
   plugin_platform_interface:
     dependency: transitive
     description:
@@ -302,7 +302,7 @@ packages:
       name: protobuf
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.0.0"
+    version: "2.0.1"
   provider:
     dependency: "direct main"
     description:

pubspec.lock

@@ -239,7 +239,7 @@ packages:
       name: protobuf
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.0.0"
+    version: "2.0.1"
   sky_engine:
     dependency: transitive
     description: flutter

pubspec.yaml

@@ -21,7 +21,7 @@ dependencies:
   logging: ^1.0.2
   uuid: ^3.0.4
   synchronized: ^3.0.0
-  protobuf: ^2.0.0
+  protobuf: ^2.0.1
   visibility_detector: ^0.2.2
   flutter_webrtc: ^0.7.1