fix edition 2018

Cargo.toml

@@ -8,6 +8,7 @@ readme = "README.md"
 homepage = "https://github.com/paritytech/bn"
 repository = "https://github.com/paritytech/bn"
 license = "MIT OR Apache-2.0"
+edition = "2018"
 
 [features]
 default = ["rustc-serialize"]

benches/api.rs

@@ -1,10 +1,6 @@
 #![feature(test)]
-extern crate bincode;
-extern crate bn;
-extern crate rand;
-extern crate test;
 
-use bn::*;
+use substrate_bn::*;
 use bincode::SizeLimit::Infinite;
 use bincode::rustc_serialize::{decode, encode};
 

examples/dh.rs

@@ -1,10 +1,7 @@
 // This is an example of three-party Diffie-Hellman key exchange
 // Requires two rounds
 
-extern crate bn;
-extern crate rand;
-
-use bn::*;
+use substrate_bn::*;
 
 fn main() {
     let rng = &mut rand::thread_rng();

examples/joux.rs

@@ -1,6 +1,4 @@
-extern crate bn;
-extern crate rand;
-use bn::{Group, Fr, G1, G2, pairing};
+use substrate_bn::{Group, Fr, G1, G2, pairing};
 
 fn main() {
     let rng = &mut rand::thread_rng();

tests/serialization.rs

@@ -1,11 +1,6 @@
 #![cfg(feature = "rustc-serialize")]
 
-extern crate rand;
-extern crate bn;
-extern crate bincode;
-extern crate rustc_serialize;
-
-use bn::*;
+use substrate_bn::*;
 
 use bincode::SizeLimit::Infinite;
 use bincode::rustc_serialize::{encode, decode};