Remove serde_derive https://github.com/serde-rs/serde/issues/1441#issuecomment-445481084

diesel/Cargo.toml

@@ -13,9 +13,8 @@ bytes = "0.4"
 env_logger = "0.6"
 futures = "0.3.1"
 uuid = { version = "0.5", features = ["serde", "v4"] }
-serde = "1.0"
+serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-serde_derive = "1.0"
 
 diesel = { version = "^1.1.0", features = ["sqlite", "r2d2"] }
 r2d2 = "0.8"

diesel/src/main.rs

@@ -6,8 +6,7 @@
 //! of them can run in parallel and process messages from same queue.
 #[macro_use]
 extern crate diesel;
-#[macro_use]
-extern crate serde_derive;
+use serde::{Deserialize, Serialize};
 
 use actix_web::{error, middleware, web, App, Error, HttpResponse, HttpServer};
 use diesel::prelude::*;

diesel/src/models.rs

@@ -1,4 +1,5 @@
 use super::schema::users;
+use serde::Serialize;
 
 #[derive(Serialize, Queryable)]
 pub struct User {