fix

Author: honfika

src/Titanium.Web.Proxy/Extensions/SslExtensions.cs

@@ -1,5 +1,10 @@
 using System.Collections.Generic;
+using System.Diagnostics.CodeAnalysis;
 using System.Net.Security;
+using System.Security.Authentication;
+using System.Security.Cryptography.X509Certificates;
+using System.Threading;
+using System.Threading.Tasks;
 using Titanium.Web.Proxy.StreamExtended;
 
 namespace Titanium.Web.Proxy.Extensions

src/Titanium.Web.Proxy/Helpers/HttpStream.cs

@@ -1,4 +1,5 @@
 using System;
+using System.Buffers;
 using System.Diagnostics;
 using System.Globalization;
 using System.IO;