Release 2.0.0

Changed

• Changed to fluent writing permission in a route.

            web::scope("").route(
                "/",
                permission()
                    .check(web::get())
                    .validate(dummy_permission_check)
                    .to(index)
                    .build(),
            ),

• Deprecated check and check_with_custom_deny in favor of permission() builder.
• Fixed disappearing Payload from handler.