Upgrade rust/crates/regex to 1.4.2

Test: make
Change-Id: I29c3d9dd49dfbaac10af4048c1bdfabf4518bff4
diff --git a/METADATA b/METADATA
index 86023f9..663a944 100644
--- a/METADATA
+++ b/METADATA
@@ -7,13 +7,13 @@
   }
   url {
     type: ARCHIVE
-    value: "https://static.crates.io/crates/regex/regex-1.4.1.crate"
+    value: "https://static.crates.io/crates/regex/regex-1.4.2.crate"
   }
-  version: "1.4.1"
+  version: "1.4.2"
   license_type: NOTICE
   last_upgrade_date {
     year: 2020
-    month: 10
-    day: 26
+    month: 11
+    day: 2
   }
 }