Update nitrokey crate to 0.4.0

This change finally updates the version of the nitrokey crate that we
consume to 0.4.0. Along with that we update rand_core, one of its
dependencies, to 0.5.1. Further more we add cfg-if in version 0.1.10 and
getrandom in version 0.1.13, both of which are now new (non-development)
dependencies.

Import subrepo nitrokey/:nitrokey at e81057037e9b4f370b64c0a030a725bc6bdfb870
Import subrepo cfg-if/:cfg-if at 4484a6faf816ff8058088ad857b0c6bb2f4b02b2
Import subrepo getrandom/:getrandom at d661aa7e1b8cc80b47dabe3d2135b3b47d2858af
Import subrepo rand/:rand at d877ed528248b52d947e0484364a4e1ae59ca502

1 files changed, 4 insertions, 7 deletions

diff --git a/rand/rand_xorshift/tests/mod.rs b/rand/rand_xorshift/tests/mod.rs
index 8374b64..7ecdeae 100644
--- a/rand/rand_xorshift/tests/mod.rs
+++ b/rand/rand_xorshift/tests/mod.rs
@@ -1,7 +1,3 @@
-extern crate rand_core;
-extern crate rand_xorshift;
-#[cfg(all(feature="serde1", test))] extern crate bincode;
-
 use rand_core::{RngCore, SeedableRng};
 use rand_xorshift::XorShiftRng;
 
@@ -12,9 +8,10 @@ fn test_xorshift_construction() {
     let mut rng1 = XorShiftRng::from_seed(seed);
     assert_eq!(rng1.next_u64(), 4325440999699518727);
 
-    let _rng2 = XorShiftRng::from_rng(rng1).unwrap();
-    // Note: we cannot test the state of _rng2 because from_rng does not
-    // fix Endianness. This is allowed in the trait specification.
+    let mut rng2 = XorShiftRng::from_rng(&mut rng1).unwrap();
+    // Yes, this makes rng2 a clone of rng1!
+    assert_eq!(rng1.next_u64(), 15614385950550801700);
+    assert_eq!(rng2.next_u64(), 15614385950550801700);
 }
 
 #[test]