Warnings fixups

Author: pglombardo

Source/HiveMQtt/Client/Transport/TCPTransport.cs

@@ -15,7 +15,6 @@
  */
 namespace HiveMQtt.Client.Transport;
 
-using System.Data;
 using System.IO.Pipelines;
 using System.Net;
 using System.Net.Security;

Source/HiveMQtt/Client/Transport/WebSocketTransport.cs

@@ -108,7 +108,7 @@ public override async Task<bool> WriteAsync(byte[] buffer, CancellationToken can
     /// <exception cref="OperationCanceledException">Thrown when the operation is canceled.</exception>
     public override async Task<TransportReadResult> ReadAsync(CancellationToken cancellationToken = default)
     {
-        var buffer = new ArraySegment<byte>(new Byte[8192]);
+        var buffer = new ArraySegment<byte>(new byte[8192]);
         WebSocketReceiveResult result;
 
         using (var ms = new MemoryStream())

Tests/HiveMQtt.Test/HiveMQClient/PubSubTest.cs

@@ -78,7 +78,7 @@ public async Task QoS1PubSubAsync()
             Assert.Equal(testPayload, args.PublishMessage.PayloadAsString);
 
             Interlocked.Increment(ref messagesReceived);
-            if (messagesReceived == 10 && taskCompletionSource.Task.IsCompleted == false)
+            if (messagesReceived == 10 && !taskCompletionSource.Task.IsCompleted)
             {
                 taskCompletionSource.SetResult(true);
             }

Tests/HiveMQtt.Test/HiveMQClient/PublishBuilderTest.cs

@@ -193,7 +193,7 @@ public async Task PublishWithOptionsAsync()
         Assert.IsType<Client.Results.PublishResult>(publishResult);
         Assert.Null(publishResult.QoS1ReasonCode);
         Assert.Null(publishResult.QoS2ReasonCode);
-        Assert.Equal(MQTT5.Types.QualityOfService.AtMostOnceDelivery, publishResult.Message.QoS);
+        Assert.Equal(QualityOfService.AtMostOnceDelivery, publishResult.Message.QoS);
         Assert.Equal("test", publishResult.Message.UserProperties["test"]);
 
         var disconnectResult = await client.DisconnectAsync().ConfigureAwait(false);