Fix NIOLock warning

Author: fabianfett

Package.swift

@@ -25,7 +25,7 @@ let package = Package(
     dependencies: [
         .package(url: "https://github.com/apple/swift-log.git", from: "1.0.0"),
         .package(url: "https://github.com/apple/swift-metrics.git", "1.0.0" ..< "3.0.0"),
-        .package(url: "https://github.com/apple/swift-nio.git", from: "2.18.0"),
+        .package(url: "https://github.com/apple/swift-nio.git", from: "2.43.0"),
         .package(url: "https://github.com/apple/swift-service-discovery", from: "1.0.0"),
     ],
     targets: [

Sources/RediStack/RedisConnection.swift

@@ -152,7 +152,7 @@ public final class RedisConnection: RedisClient {
 
     private let autoflush = ManagedAtomic<Bool>(true)
     private let allowPubSub = ManagedAtomic<Bool>(true)
-    private let _stateLock = Lock()
+    private let _stateLock = NIOLock()
     private var _state = ConnectionState.open
     private var state: ConnectionState {
         get { return _stateLock.withLock { self._state } }