Fix audio dispose

src/Discord.Net.WebSocket/Audio/Streams/BufferedWriteStream.cs

@@ -61,14 +61,17 @@ namespace Discord.Audio.Streams
 
             _task = Run();
         }
+
         protected override void Dispose(bool disposing)
         {
             if (disposing)
             {
                 _disposeTokenSource?.Cancel();
                 _disposeTokenSource?.Dispose();
+                _cancelTokenSource?.Cancel();
                 _cancelTokenSource?.Dispose();
                 _queueLock?.Dispose();
+                _next.Dispose();
             }
             base.Dispose(disposing);
         }

src/Discord.Net.WebSocket/Audio/Streams/OpusEncodeStream.cs

@@ -1,4 +1,4 @@
-using System;
+using System;
 using System.Threading;
 using System.Threading.Tasks;
 
@@ -89,10 +89,12 @@ namespace Discord.Audio.Streams
 
         protected override void Dispose(bool disposing)
         {
-            base.Dispose(disposing);
-
             if (disposing)
+            {
                 _encoder.Dispose();
+                _next.Dispose();
+            }
+            base.Dispose(disposing);
         }
     }
 }

src/Discord.Net.WebSocket/Audio/Streams/RTPWriteStream.cs

@@ -1,4 +1,4 @@
-using System;
+using System;
 using System.Threading;
 using System.Threading.Tasks;
 
@@ -69,5 +69,12 @@ namespace Discord.Audio.Streams
         {
             await _next.ClearAsync(cancelToken).ConfigureAwait(false);
         }
+
+        protected override void Dispose(bool disposing)
+        {
+            if (disposing)
+                _next.Dispose();
+            base.Dispose(disposing);
+        }
     }
 }

src/Discord.Net.WebSocket/Audio/Streams/SodiumEncryptStream.cs

@@ -60,5 +60,12 @@ namespace Discord.Audio.Streams
         {
             await _next.ClearAsync(cancelToken).ConfigureAwait(false);
         }
+
+        protected override void Dispose(bool disposing)
+        {
+            if (disposing)
+                _next.Dispose();
+            base.Dispose(disposing);
+        }
     }
 }