Update parking_lot to v0.9
@@ -15,7 +15,7 @@ fnv = "1.0"
futures = "0.1"
libp2p-core = { version = "0.13.0", path = "../../core" }
log = "0.4"
-parking_lot = "0.8"
+parking_lot = "0.9"
tokio-codec = "0.1"
tokio-io = "0.1"
unsigned-varint = { version = "0.2.1", features = ["codec"] }
