update flutter_whatsnew to ^1.0.3

this solves the issue rodydavis#34

Author: Eduardoavargas

pubspec.yaml

@@ -11,7 +11,7 @@ dependencies:
     sdk: flutter
   uuid: ^2.0.0
   get_version: ^0.0.8+5
-  flutter_whatsnew: ^0.2.0+3
+  flutter_whatsnew: ^1.0.3
   shared_preferences: ^0.5.6+1
   local_auth: ^0.6.1
   cupertino_icons: ^0.1.2