Update dependency redlock to v4.2.0

Author: renovate[bot]

src/mutex/drivers/redis/package.json

@@ -16,7 +16,7 @@
     "machine": "15.2.2",
     "mutex-promise": "0.1.0",
     "redis": "3.1.1",
-    "redlock": "4.1.0",
+    "redlock": "4.2.0",
     "uuid": "8.1.0"
   }
 }