Upgrade rust/crates/syn to 1.0.18

Test: None
Change-Id: Icdd0d591a6986f723c14cc32bdf970d0ee818596

1 files changed, 2 insertions, 2 deletions

diff --git a/METADATA b/METADATA
index 8e8342bd..980fd7d2 100644
--- a/METADATA
+++ b/METADATA
@@ -9,10 +9,10 @@ third_party {
     type: GIT
     value: "https://github.com/dtolnay/syn"
   }
-  version: "1.0.17"
+  version: "1.0.18"
   last_upgrade_date {
     year: 2020
     month: 4
-    day: 16
+    day: 23
   }
 }