Upgrade rust/crates/which to 4.0.1

Test: make
Change-Id: Ib1b3363614d4c215d826a75dfebb2fa8517f1067

1 files changed, 3 insertions, 3 deletions

diff --git a/METADATA b/METADATA
index 9595f0d..6c5876e 100644
--- a/METADATA
+++ b/METADATA
@@ -9,11 +9,11 @@ third_party {
     type: GIT
     value: "https://github.com/harryfei/which-rs.git"
   }
-  version: "3.1.1"
+  version: "4.0.1"
   license_type: NOTICE
   last_upgrade_date {
     year: 2020
-    month: 3
-    day: 31
+    month: 7
+    day: 10
   }
 }