Fix NIOLock warning

# Conflicts:
#	Package.swift
#	Sources/RediStack/RedisConnection.swift

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: "2.0.0")
+        .package(url: "https://github.com/apple/swift-nio.git", from: "2.43.0"),
     ],
     targets: [
         .target(name: "RediStack", dependencies: ["NIO", "Logging", "Metrics"]),

Sources/RediStack/RedisConnection.swift

@@ -150,7 +150,7 @@ public final class RedisConnection: RedisClient, RedisClientWithUserContext {
 
     private let autoflush: NIOAtomic<Bool> = .makeAtomic(value: true)
     private let allowPubSub: NIOAtomic<Bool> = .makeAtomic(value: true)
-    private let _stateLock = Lock()
+    private let _stateLock = NIOLock()
     private var _state = ConnectionState.open
     private var state: ConnectionState {
         get { return _stateLock.withLock { self._state } }