Merge pull request #125 from flutter-webrtc/renovate/shared_preferences-2.x

Update dependency shared_preferences to v2

Author: cloudwebrtc

pubspec.yaml

@@ -11,7 +11,7 @@ dependencies:
 
   cupertino_icons: ^1.0.0
   flutter_webrtc: ^0.5.8
-  shared_preferences: ^0.5.12
+  shared_preferences: ^2.0.0
   http: ^0.12.1
   path_provider: ^1.6.24