Make new required Rust version 1.32.

README.md

@@ -8,7 +8,7 @@
 This is a pure Rust implementation of the Jubjub elliptic curve group and its associated fields.
 
 * **This implementation has not been reviewed or audited. Use at your own risk.**
-* This implementation targets Rust `1.31` or later.
+* This implementation targets Rust `1.32` or later.
 * All operations are constant time unless explicitly noted.
 
 ## Features

benches/fr_bench.rs

@@ -1,6 +1,5 @@
 #![feature(test)]
 
-extern crate jubjub;
 extern crate test;
 
 use jubjub::*;