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, 3 insertions, 5 deletions

diff --git a/rand/rand_xoshiro/src/xoshiro128plus.rs b/rand/rand_xoshiro/src/xoshiro128plus.rs
index b0c7cc7..7cbd612 100644
--- a/rand/rand_xoshiro/src/xoshiro128plus.rs
+++ b/rand/rand_xoshiro/src/xoshiro128plus.rs
@@ -6,6 +6,7 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
+#[cfg(feature="serde1")] use serde::{Serialize, Deserialize};
 use rand_core::impls::{next_u64_via_u32, fill_bytes_via_next};
 use rand_core::le::read_u32_into;
 use rand_core::{SeedableRng, RngCore, Error};
@@ -20,6 +21,7 @@ use rand_core::{SeedableRng, RngCore, Error};
 /// reference source code](http://xoshiro.di.unimi.it/xoshiro128starstar.c) by
 /// David Blackman and Sebastiano Vigna.
 #[derive(Debug, Clone)]
+#[cfg_attr(feature="serde1", derive(Serialize, Deserialize))]
 pub struct Xoshiro128Plus {
     s: [u32; 4],
 }
@@ -31,10 +33,7 @@ impl Xoshiro128Plus {
     /// parallel computations.
     ///
     /// ```
-    /// # extern crate rand;
-    /// # extern crate rand_xoshiro;
-    /// # fn main() {
-    /// use rand::SeedableRng;
+    /// use rand_xoshiro::rand_core::SeedableRng;
     /// use rand_xoshiro::Xoroshiro128StarStar;
     ///
     /// let rng1 = Xoroshiro128StarStar::seed_from_u64(0);
@@ -42,7 +41,6 @@ impl Xoshiro128Plus {
     /// rng2.jump();
     /// let mut rng3 = rng2.clone();
     /// rng3.jump();
-    /// # }
     /// ```
     pub fn jump(&mut self) {
         impl_jump!(u32, self, [0x8764000b, 0xf542d2d3, 0x6fa035c3, 0x77f2db5b]);