Fix some compile errors

Signed-off-by: Tom Kaitchuck <Tom.Kaitchuck@gmail.com>

Author: tkaitchuck

src/random_state.rs

@@ -29,7 +29,7 @@ use core::any::{Any, TypeId};
 use core::fmt;
 use core::hash::BuildHasher;
 use core::hash::Hasher;
-use std::marker::PhantomData;
+use core::marker::PhantomData;
 
 pub(crate) const PI: [u64; 4] = [
     0x243f_6a88_85a3_08d3,

src/specialize.rs

@@ -21,9 +21,9 @@ pub(crate) trait CallHasher<T> {
 }
 
 #[cfg(not(feature = "specialize"))]
-impl<T> CallHasher for T {
+impl<T> CallHasher<T> for T {
     #[inline]
-    fn get_hash<H: Hash + ?Sized, B: BuildHasher>(value: &H, build_hasher: &B) -> u64 {
+    fn get_hash<H: Hash + ?Sized>(value: &H, build_hasher: &RandomState<T>) -> u64 {
         let mut hasher = build_hasher.build_hasher();
         value.hash(&mut hasher);
         hasher.finish()