chore: update rocket example

examples/rocket/Cargo.toml

@@ -2,11 +2,11 @@
 name = "itconfig-rocket-example"
 version = "0.1.0"
 authors = ["Dmitriy Pleshevskiy <dmitriy@ideascup.me>"]
-edition = "2018"
+edition = "2021"
 publish = false
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
-rocket = "0.4.7"
+rocket = "0.5.0-rc.1"
 itconfig = { path = '../../itconfig', features = ["macro"] }

examples/rocket/src/main.rs

@@ -3,10 +3,8 @@
 #[macro_use]
 extern crate rocket;
 
-use itconfig::config;
-
-config! {
-    ROCKET {
+itconfig::config! {
+    rocket {
         HOST: String => "localhost",
         PORT: u16 => 9000,
         BASE_URL => "/",
@@ -14,14 +12,13 @@ config! {
 }
 
 #[get("/")]
-fn index() -> &'static str {
+fn hello() -> &'static str {
     "Hello, world!"
 }
 
-fn main() {
+#[launch]
+fn rocket() -> _ {
     config::init();
 
-    rocket::ignite()
-        .mount(config::ROCKET::BASE_URL(), routes![index])
-        .launch();
+    rocket::build().mount(config::rocket::BASE_URL(), routes![hello])
 }