Merge pull request #2 from DeltaManiac/patch-1

Fix build failure on rustc 1.42.0-nightly (8417d68de 2020-02-03)

Author: PSeitz

src/table.rs

@@ -9,7 +9,7 @@
 // except according to those terms.
 
 use self::BucketState::*;
-use std::alloc::{handle_alloc_error, Alloc, Global, Layout, LayoutErr};
+use std::alloc::{handle_alloc_error, AllocRef, Global, Layout, LayoutErr};
 use std::collections::TryReserveError;
 use std::marker;
 use std::mem::{needs_drop, size_of};