Update device_info_plus

Author: nohli

templates/flutter/pubspec.yaml.twig

@@ -12,7 +12,7 @@ dependencies:
   flutter:
     sdk: flutter
   cookie_jar: ^3.0.1
-  device_info_plus: ^7.0.1
+  device_info_plus: ^8.0.0
   flutter_web_auth_2: ^1.1.2
   http: ^0.13.5
   package_info_plus: ^3.0.1