Upgrade rust/crates/tokio-test to 0.4.2

Test: make
Change-Id: I169343506a12b86ff0484b2a7e197389c2a3e30c
diff --git a/METADATA b/METADATA
index 22032a7..f1e1ef3 100644
--- a/METADATA
+++ b/METADATA
@@ -7,13 +7,13 @@
   }
   url {
     type: ARCHIVE
-    value: "https://static.crates.io/crates/tokio-test/tokio-test-0.4.1.crate"
+    value: "https://static.crates.io/crates/tokio-test/tokio-test-0.4.2.crate"
   }
-  version: "0.4.1"
+  version: "0.4.2"
   license_type: NOTICE
   last_upgrade_date {
     year: 2021
-    month: 4
-    day: 2
+    month: 5
+    day: 19
   }
 }