Upgrade rust/crates/syn to 1.0.20

Test: None
Change-Id: Iaa0f8b7a33518d375dc43462e38eded50e390b88

1 files changed, 2 insertions, 2 deletions

diff --git a/METADATA b/METADATA
index 0d3f7ccc..06321d53 100644
--- a/METADATA
+++ b/METADATA
@@ -9,11 +9,11 @@ third_party {
     type: GIT
     value: "https://github.com/dtolnay/syn"
   }
-  version: "1.0.19"
+  version: "1.0.20"
   license_type: NOTICE
   last_upgrade_date {
     year: 2020
     month: 5
-    day: 6
+    day: 12
   }
 }