rust/hg-core/Cargo.toml

--- a/rust/hg-core/Cargo.toml	Thu Sep 16 16:42:16 2021 -0700
+++ b/rust/hg-core/Cargo.toml	Fri Sep 17 08:57:12 2021 +0200
@@ -29,7 +29,7 @@
 crossbeam-channel = "0.4"
 micro-timer = "0.3.0"
 log = "0.4.8"
-memmap2 = "0.3.1"
+memmap2 = {version = "0.4", features = ["stable_deref_trait"]}
 zstd = "0.5.3"
 format-bytes = "0.2.2"