Reuse std::hash::RandomState to get rid of rand dependency

Cargo.toml

@@ -1,7 +1,7 @@
 [package]
 name = "gxhash"
 authors = ["Olivier Giniaux"]
-version = "3.2.0"
+version = "3.3.0"
 edition = "2021"
 description = "GxHash non-cryptographic algorithm"
 license = "MIT"
@@ -20,9 +20,10 @@ bench-plot = []
 hybrid = []
 
 [dependencies]
-rand = "0.8"
+# No dependencies!
 
 [dev-dependencies]
+rand = "0.8"
 lazy_static = { version = "1.4" }
 itertools = "0.12.0"
 # Benchmarks

src/hasher.rs

@@ -1,8 +1,5 @@
 use std::collections::{HashMap, HashSet};
 use std::hash::{BuildHasher, Hasher};
-use std::mem::MaybeUninit;
-
-use rand::RngCore;
 
 use crate::gxhash::platform::*;
 use crate::gxhash::*;
@@ -138,13 +135,10 @@ pub struct GxBuildHasher(State);
 impl Default for GxBuildHasher {
     #[inline]
     fn default() -> GxBuildHasher {
-        let mut uninit: MaybeUninit<State> = MaybeUninit::uninit();
-        let mut rng = rand::thread_rng();
+        let random_state = std::hash::RandomState::new();
         unsafe {
-            let ptr = uninit.as_mut_ptr() as *mut u8;
-            let slice = std::slice::from_raw_parts_mut(ptr, VECTOR_SIZE);
-            rng.fill_bytes(slice);
-            GxBuildHasher(uninit.assume_init())
+            let state: State = std::mem::transmute(random_state);
+            GxBuildHasher(state)
         }
     }
 }