Add caret

Author: nohli

templates/flutter/pubspec.yaml.twig

@@ -14,7 +14,7 @@ dependencies:
   device_info_plus: ^4.1.2
   flutter_web_auth: ^0.4.1
   http: ^0.13.5
-  package_info_plus: 1.4.3+1
+  package_info_plus: ^1.4.3+1
   path_provider: ^2.0.11
   web_socket_channel: ^2.2.0