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, 8 insertions, 3 deletions

diff --git a/rand/rand_chacha/src/lib.rs b/rand/rand_chacha/src/lib.rs
index 74ad466..e374bdd 100644
--- a/rand/rand_chacha/src/lib.rs
+++ b/rand/rand_chacha/src/lib.rs
@@ -16,10 +16,15 @@
 #![deny(missing_debug_implementations)]
 #![doc(test(attr(allow(unused_variables), deny(warnings))))]
 
-#![no_std]
+#![cfg_attr(not(feature = "std"), no_std)]
 
-pub extern crate rand_core;
+pub use rand_core;
 
 mod chacha;
 
-pub use chacha::{ChaChaRng, ChaChaCore};
+pub use crate::chacha::{ChaCha12Core, ChaCha12Rng, ChaCha20Core, ChaCha20Rng, ChaCha8Core, ChaCha8Rng};
+
+/// ChaCha with 20 rounds
+pub type ChaChaRng = ChaCha20Rng;
+/// ChaCha with 20 rounds, low-level interface
+pub type ChaChaCore = ChaCha20Core;