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diff --git a/vendor/rdrand/src/lib.rs b/vendor/rdrand/src/lib.rs
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index 423ae21..0000000
--- a/vendor/rdrand/src/lib.rs
+++ /dev/null
@@ -1,472 +0,0 @@
-// Copyright © 2014, Simonas Kazlauskas <rdrand@kazlauskas.me>
-//
-// Permission to use, copy, modify, and/or distribute this software for any purpose with or without
-// fee is hereby granted, provided that the above copyright notice and this permission notice
-// appear in all copies.
-//
-// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS
-// SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE
-// AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
-// WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT,
-// NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
-// OF THIS SOFTWARE.
-//! An implementation of random number generators based on `rdrand` and `rdseed` instructions.
-//!
-//! The random number generators provided by this crate are fairly slow (the latency for these
-//! instructions is pretty high), but provide high quality random bits. Caveat is: neither AMD’s
-//! nor Intel’s designs are public and therefore are not verifiable for lack of backdoors.
-//!
-//! Unless you know what you are doing, use the random number generators provided by the `rand`
-//! crate (such as `OsRng`) instead.
-//!
-//! Here are a measurements for select processor architectures. Check [Agner’s instruction tables]
-//! for up-to-date listings.
-//!
-//! <table>
-//!   <tr>
-//!     <th>Architecture</th>
-//!     <th colspan="3">Latency (cycles)</th>
-//!     <th>Maximum throughput (per core)</th>
-//!   </tr>
-//!   <tr>
-//!     <td></td>
-//!     <td>u16</td>
-//!     <td>u32</td>
-//!     <td>u64</td>
-//!     <td></td>
-//!   </tr>
-//!   <tr>
-//!     <td>AMD Ryzen</td>
-//!     <td>~1200</td>
-//!     <td>~1200</td>
-//!     <td>~2500</td>
-//!     <td>~12MB/s @ 3.7GHz</td>
-//!   </tr>
-//!   <tr>
-//!     <td>Intel Skylake</td>
-//!     <td>460</td>
-//!     <td>460</td>
-//!     <td>460</td>
-//!     <td>~72MB/s @ 4.2GHz</td>
-//!   </tr>
-//!   <tr>
-//!     <td>Intel Haswell</td>
-//!     <td>320</td>
-//!     <td>320</td>
-//!     <td>320</td>
-//!     <td>~110MB/s @ 4.4GHz</td>
-//!   </tr>
-//! </table>
-//!
-//! [Agner’s instruction tables]: http://agner.org/optimize/
-#![cfg_attr(not(feature = "std"), no_std)]
-
-extern crate rand_core;
-
-#[cfg(feature = "std")]
-extern crate core;
-
-pub mod changelog;
-
-use rand_core::{RngCore, CryptoRng, Error, ErrorKind};
-use core::slice;
-
-const RETRY_LIMIT: u8 = 127;
-
-#[cold]
-#[inline(never)]
-pub(crate) fn busy_loop_fail() -> ! {
-    panic!("hardware generator failure");
-}
-
-/// A cryptographically secure statistically uniform, non-periodic and non-deterministic random bit
-/// generator.
-///
-/// Note that this generator may be implemented using a deterministic algorithm that is reseeded
-/// routinely from a non-deterministic entropy source to achieve the desirable properties.
-///
-/// This generator is a viable replacement to any generator, however, since nobody has audited
-/// Intel or AMD hardware yet, the usual disclaimers as to their suitability apply.
-///
-/// It is potentially faster than `OsRng`, but is only supported on more recent Intel (Ivy Bridge
-/// and later) and AMD (Ryzen and later) processors.
-#[derive(Clone, Copy)]
-pub struct RdRand(());
-
-/// A cryptographically secure non-deterministic random bit generator.
-///
-/// This generator produces high-entropy output and is suited to seed other pseudo-random
-/// generators.
-///
-/// This instruction currently is only available in Intel Broadwell (and later) and AMD Ryzen
-/// processors.
-///
-/// This generator is not intended for general random number generation purposes and should be used
-/// to seed other generators implementing [rand_core::SeedableRng].
-#[derive(Clone, Copy)]
-pub struct RdSeed(());
-
-impl CryptoRng for RdRand {}
-impl CryptoRng for RdSeed {}
-
-mod arch {
-    #[cfg(target_arch = "x86_64")]
-    pub use core::arch::x86_64::*;
-    #[cfg(target_arch = "x86")]
-    pub use core::arch::x86::*;
-
-    #[cfg(target_arch = "x86")]
-    pub(crate) unsafe fn _rdrand64_step(dest: &mut u64) -> i32 {
-        let mut ret1: u32 = ::core::mem::uninitialized();
-        let mut ret2: u32 = ::core::mem::uninitialized();
-        if _rdrand32_step(&mut ret1) != 0 && _rdrand32_step(&mut ret2) != 0 {
-            *dest = (ret1 as u64) << 32 | (ret2 as u64);
-            1
-        } else {
-            0
-        }
-    }
-
-    #[cfg(target_arch = "x86")]
-    pub(crate) unsafe fn _rdseed64_step(dest: &mut u64) -> i32 {
-        let mut ret1: u32 = ::core::mem::uninitialized();
-        let mut ret2: u32 = ::core::mem::uninitialized();
-        if _rdseed32_step(&mut ret1) != 0 && _rdseed32_step(&mut ret2) != 0 {
-            *dest = (ret1 as u64) << 32 | (ret2 as u64);
-            1
-        } else {
-            0
-        }
-    }
-}
-
-#[cfg(not(feature = "std"))]
-macro_rules! is_x86_feature_detected {
-    ("rdrand") => {{
-        if cfg!(target_feature="rdrand") {
-            true
-        } else if cfg!(target_env = "sgx") {
-            false
-        } else {
-            const FLAG : u32 = 1 << 30;
-            unsafe { ::arch::__cpuid(1).ecx & FLAG == FLAG }
-        }
-    }};
-    ("rdseed") => {{
-        if cfg!(target_feature = "rdseed") {
-            true
-        } else if cfg!(target_env = "sgx") {
-            false
-        } else {
-            const FLAG : u32 = 1 << 18;
-            unsafe { ::arch::__cpuid(7).ebx & FLAG == FLAG }
-        }
-    }};
-}
-
-macro_rules! loop_rand {
-    ($el: ty, $step: path) => { {
-        let mut idx = 0;
-        loop {
-            let mut el: $el = ::core::mem::uninitialized();
-            if $step(&mut el) != 0 {
-                break Some(el);
-            } else if idx == RETRY_LIMIT {
-                break None;
-            }
-            idx += 1;
-        }
-    } }
-}
-
-macro_rules! impl_rand {
-    ($gen:ident, $feat:tt, $step16: path, $step32:path, $step64:path,
-     maxstep = $maxstep:path, maxty = $maxty: ty) => {
-        impl $gen {
-            /// Create a new instance of the random number generator.
-            ///
-            /// This constructor checks whether the CPU the program is running on supports the
-            /// instruction necessary for this generator to operate. If the instruction is not
-            /// supported, an error is returned.
-            pub fn new() -> Result<Self, Error> {
-                if is_x86_feature_detected!($feat) {
-                    Ok($gen(()))
-                } else {
-                    Err(Error::new(rand_core::ErrorKind::Unavailable,
-                                   "the instruction is not supported"))
-                }
-            }
-
-            /// Generate a single random `u16` value.
-            ///
-            /// The underlying instruction may fail for variety reasons (such as actual hardware
-            /// failure or exhausted entropy), however the exact reason for the failure is not
-            /// usually exposed.
-            ///
-            /// This method will retry calling the instruction a few times, however if all the
-            /// attempts fail, it will return `None`.
-            ///
-            /// In case `None` is returned, the caller should assume that an non-recoverable
-            /// hardware failure has occured and use another random number genrator instead.
-            #[inline(always)]
-            pub fn try_next_u16(&self) -> Option<u16> {
-                #[target_feature(enable = $feat)]
-                unsafe fn imp()
-                -> Option<u16> {
-                    loop_rand!(u16, $step16)
-                }
-                unsafe { imp() }
-            }
-
-            /// Generate a single random `u32` value.
-            ///
-            /// The underlying instruction may fail for variety reasons (such as actual hardware
-            /// failure or exhausted entropy), however the exact reason for the failure is not
-            /// usually exposed.
-            ///
-            /// This method will retry calling the instruction a few times, however if all the
-            /// attempts fail, it will return `None`.
-            ///
-            /// In case `None` is returned, the caller should assume that an non-recoverable
-            /// hardware failure has occured and use another random number genrator instead.
-            #[inline(always)]
-            pub fn try_next_u32(&self) -> Option<u32> {
-                #[target_feature(enable = $feat)]
-                unsafe fn imp()
-                -> Option<u32> {
-                    loop_rand!(u32, $step32)
-                }
-                unsafe { imp() }
-            }
-
-            /// Generate a single random `u64` value.
-            ///
-            /// The underlying instruction may fail for variety reasons (such as actual hardware
-            /// failure or exhausted entropy), however the exact reason for the failure is not
-            /// usually exposed.
-            ///
-            /// This method will retry calling the instruction a few times, however if all the
-            /// attempts fail, it will return `None`.
-            ///
-            /// In case `None` is returned, the caller should assume that an non-recoverable
-            /// hardware failure has occured and use another random number genrator instead.
-            ///
-            /// Note, that on 32-bit targets, there’s no underlying instruction to generate a
-            /// 64-bit number, so it is emulated with the 32-bit version of the instruction.
-            #[inline(always)]
-            pub fn try_next_u64(&self) -> Option<u64> {
-                #[target_feature(enable = $feat)]
-                unsafe fn imp()
-                -> Option<u64> {
-                    loop_rand!(u64, $step64)
-                }
-                unsafe { imp() }
-            }
-        }
-
-        impl RngCore for $gen {
-            /// Generate a single random `u32` value.
-            ///
-            /// The underlying instruction may fail for variety reasons (such as actual hardware
-            /// failure or exhausted entropy), however the exact reason for the failure is not
-            /// usually exposed.
-            ///
-            /// # Panic
-            ///
-            /// This method will retry calling the instruction a few times, however if all the
-            /// attempts fail, it will `panic`.
-            ///
-            /// In case `panic` occurs, the caller should assume that an non-recoverable
-            /// hardware failure has occured and use another random number genrator instead.
-            #[inline(always)]
-            fn next_u32(&mut self) -> u32 {
-                if let Some(result) = self.try_next_u32() {
-                    result
-                } else {
-                    busy_loop_fail()
-                }
-            }
-
-            /// Generate a single random `u64` value.
-            ///
-            /// The underlying instruction may fail for variety reasons (such as actual hardware
-            /// failure or exhausted entropy), however the exact reason for the failure is not
-            /// usually exposed.
-            ///
-            /// Note, that on 32-bit targets, there’s no underlying instruction to generate a
-            /// 64-bit number, so it is emulated with the 32-bit version of the instruction.
-            ///
-            /// # Panic
-            ///
-            /// This method will retry calling the instruction a few times, however if all the
-            /// attempts fail, it will `panic`.
-            ///
-            /// In case `panic` occurs, the caller should assume that an non-recoverable
-            /// hardware failure has occured and use another random number genrator instead.
-            #[inline(always)]
-            fn next_u64(&mut self) -> u64 {
-                if let Some(result) = self.try_next_u64() {
-                    result
-                } else {
-                    busy_loop_fail()
-                }
-            }
-
-            /// Fill a buffer `dest` with random data.
-            ///
-            /// See `try_fill_bytes` for a more extensive documentation.
-            ///
-            /// # Panic
-            ///
-            /// This method will panic any time `try_fill_bytes` would return an error.
-            #[inline(always)]
-            fn fill_bytes(&mut self, dest: &mut [u8]) {
-                if let Err(_) = self.try_fill_bytes(dest) {
-                    busy_loop_fail()
-                }
-            }
-
-            /// Fill a buffer `dest` with random data.
-            ///
-            /// This method will use the most appropriate variant of the instruction available on
-            /// the machine to achieve the greatest single-core throughput, however it has a
-            /// slightly higher setup cost than the plain `next_u32` or `next_u64` methods.
-            ///
-            /// The underlying instruction may fail for variety reasons (such as actual hardware
-            /// failure or exhausted entropy), however the exact reason for the failure is not
-            /// usually exposed.
-            ///
-            /// This method will retry calling the instruction a few times, however if all the
-            /// attempts fail, it will return an error.
-            ///
-            /// If an error is returned, the caller should assume that an non-recoverable hardware
-            /// failure has occured and use another random number genrator instead.
-            #[inline(always)]
-            fn try_fill_bytes(&mut self, dest: &mut [u8])
-            -> Result<(), Error> {
-                #[target_feature(enable = $feat)]
-                unsafe fn imp(dest: &mut [u8])
-                -> Result<(), Error>
-                {
-                    unsafe fn imp_less_fast(mut dest: &mut [u8], word: &mut $maxty,
-                                            buffer: &mut &[u8])
-                    -> Result<(), Error>
-                    {
-                        while !dest.is_empty() {
-                            if buffer.is_empty() {
-                                if let Some(w) = loop_rand!($maxty, $maxstep) {
-                                    *word = w;
-                                    *buffer = slice::from_raw_parts(
-                                        word as *const _ as *const u8,
-                                        ::core::mem::size_of::<$maxty>()
-                                    );
-                                } else {
-                                    return Err(Error::new(ErrorKind::Unexpected,
-                                                          "hardware generator failure"));
-                                }
-                            }
-
-                            let len = dest.len().min(buffer.len());
-                            let (copy_src, leftover) = buffer.split_at(len);
-                            let (copy_dest, dest_leftover) = { dest }.split_at_mut(len);
-                            *buffer = leftover;
-                            dest = dest_leftover;
-                            ::core::ptr::copy_nonoverlapping(
-                                copy_src.as_ptr(), copy_dest.as_mut_ptr(), len
-                            );
-                        }
-                        Ok(())
-                    }
-
-                    let destlen = dest.len();
-                    if destlen > ::core::mem::size_of::<$maxty>() {
-                            let (left, mid, right) = dest.align_to_mut();
-                            let mut word = 0;
-                            let mut buffer: &[u8] = &[];
-
-                            for el in mid {
-                                if let Some(val) = loop_rand!($maxty, $maxstep) {
-                                    *el = val;
-                                } else {
-                                    return Err(Error::new(ErrorKind::Unexpected,
-                                                          "hardware generator failure"));
-                                }
-                            }
-
-                            imp_less_fast(left, &mut word, &mut buffer)?;
-                            imp_less_fast(right, &mut word, &mut buffer)
-                    } else {
-                        let mut word = 0;
-                        let mut buffer: &[u8] = &[];
-                        imp_less_fast(dest, &mut word, &mut buffer)
-                    }
-                }
-                unsafe { imp(dest) }
-            }
-        }
-    }
-}
-
-#[cfg(target_arch = "x86_64")]
-impl_rand!(RdRand, "rdrand",
-           ::arch::_rdrand16_step, ::arch::_rdrand32_step, ::arch::_rdrand64_step,
-           maxstep = ::arch::_rdrand64_step, maxty = u64);
-#[cfg(target_arch = "x86_64")]
-impl_rand!(RdSeed, "rdseed",
-           ::arch::_rdseed16_step, ::arch::_rdseed32_step, ::arch::_rdseed64_step,
-           maxstep = ::arch::_rdseed64_step, maxty = u64);
-#[cfg(target_arch = "x86")]
-impl_rand!(RdRand, "rdrand",
-           ::arch::_rdrand16_step, ::arch::_rdrand32_step, ::arch::_rdrand64_step,
-           maxstep = ::arch::_rdrand32_step, maxty = u32);
-#[cfg(target_arch = "x86")]
-impl_rand!(RdSeed, "rdseed",
-           ::arch::_rdseed16_step, ::arch::_rdseed32_step, ::arch::_rdseed64_step,
-           maxstep = ::arch::_rdseed32_step, maxty = u32);
-
-#[test]
-fn rdrand_works() {
-    let _ = RdRand::new().map(|mut r| {
-        r.next_u32();
-        r.next_u64();
-    });
-}
-
-#[test]
-fn fill_fills_all_bytes() {
-    let _ = RdRand::new().map(|mut r| {
-        let mut peach;
-        let mut banana;
-        let mut start = 0;
-        let mut end = 128;
-        'outer: while start < end {
-            banana = [0; 128];
-            for _ in 0..512 {
-                peach = [0; 128];
-                r.fill_bytes(&mut peach[start..end]);
-                for (b, p) in banana.iter_mut().zip(peach.iter()) {
-                    *b = *b | *p;
-                }
-                if (&banana[start..end]).iter().all(|x| *x != 0) {
-                    assert!(banana[..start].iter().all(|x| *x == 0), "all other values must be 0");
-                    assert!(banana[end..].iter().all(|x| *x == 0), "all other values must be 0");
-                    if start < 17 {
-                        start += 1;
-                    } else {
-                        end -= 3;
-                    }
-                    continue 'outer;
-                }
-            }
-            panic!("wow, we broke it? {} {} {:?}", start, end, &banana[..])
-        }
-    });
-}
-
-#[test]
-fn rdseed_works() {
-    let _ = RdSeed::new().map(|mut r| {
-        r.next_u32();
-        r.next_u64();
-    });
-}