Bump lru version

Author: blackbeam

Cargo.toml

@@ -21,7 +21,7 @@ futures-util = "0.3"
 futures-sink = "0.3"
 keyed_priority_queue = "0.4"
 lazy_static = "1"
-lru = "0.11.0"
+lru = "0.12.0"
 mio = { version = "0.8.0", features = ["os-poll", "net"] }
 mysql_common = { version = "0.31", default-features = false }
 once_cell = "1.7.2"