Update rand crate to 0.7

and add rand_chacha
and fix doc

Author: PaulGrandperrin

Cargo.toml

@@ -28,7 +28,8 @@ maintenance = { status = "actively-developed" }
 arbitrary = "0.4"
 
 [dev-dependencies]
-rand = "0.6"
+rand = "0.7"
+rand_chacha = "0.2"
 
 [target.'cfg(fuzzing)'.dependencies]
 lazy_static = "1.2"

README.md

@@ -198,7 +198,7 @@ When building with `cargo hfuzz`, the argument `--cfg fuzzing` is passed to `rus
 
 ```rust
 #[cfg(fuzzing)]
-let mut rng = rand::StdRng::from_seed(&[0]);
+let mut rng = rand_chacha::ChaCha8Rng::from_seed(&[0]);
 #[cfg(not(fuzzing))]
 let mut rng = rand::thread_rng();
 ```

src/lib.rs

@@ -181,10 +181,11 @@
 //! 
 //! ```rust
 //! # extern crate rand;
-//! # use rand::{Rng, StdRng, SeedableRng};
+//! # extern crate rand_chacha;
+//! # use rand::{Rng, SeedableRng};
 //! # fn main() {
 //! #[cfg(fuzzing)]
-//! let mut rng = rand::StdRng::from_seed(&[0]);
+//! let mut rng = rand_chacha::ChaCha8Rng::from_seed(&[0]);
 //! #[cfg(not(fuzzing))]
 //! let mut rng = rand::thread_rng();
 //! # }