Update 'rand' dependency to 0.8.

core/lib/Cargo.toml

@@ -42,7 +42,7 @@ parking_lot = "0.11"
 ubyte = {version = "0.10", features = ["serde"] }
 serde = { version = "1.0", features = ["derive"] }
 figment = { version = "0.10.2", features = ["toml", "env"] }
-rand = "0.7"
+rand = "0.8"
 either = "1"
 
 [dependencies.tokio]

examples/pastebin/Cargo.toml

@@ -7,4 +7,4 @@ publish = false
 
 [dependencies]
 rocket = { path = "../../core/lib" }
-rand = "0.7"
+rand = "0.8"

examples/todo/Cargo.toml

@@ -15,7 +15,7 @@ log = "0.4"
 
 [dev-dependencies]
 parking_lot = "0.11"
-rand = "0.7"
+rand = "0.8"
 
 [dependencies.rocket_contrib]
 path = "../../contrib/lib"

examples/todo/src/tests.rs

@@ -95,7 +95,7 @@ fn test_many_insertions() {
 
         for i in 0..ITER {
             // Issue a request to insert a new task with a random description.
-            let desc: String = thread_rng().sample_iter(&Alphanumeric).take(12).collect();
+            let desc: String = thread_rng().sample_iter(&Alphanumeric).take(12).map(char::from).collect();
             client.post("/todo")
                 .header(ContentType::Form)
                 .body(format!("description={}", desc))

site/guide/10-pastebin.md

@@ -183,7 +183,7 @@ Finally, add a dependency for the `rand` crate to the `Cargo.toml` file:
 ```toml
 [dependencies]
 # existing Rocket dependencies...
-rand = "0.6"
+rand = "0.8"
 ```
 
 Then, ensure that your application builds with the new code:

site/tests/Cargo.toml

@@ -10,5 +10,5 @@ rocket = { path = "../../core/lib", features = ["secrets"] }
 doc-comment = "0.3"
 rocket_contrib = { path = "../../contrib/lib", features = ["json", "tera_templates", "diesel_sqlite_pool"] }
 serde = { version = "1.0", features = ["derive"] }
-rand = "0.7"
+rand = "0.8"
 figment = { version = "0.10", features = ["toml", "env"] }