Refactor ListeningStream

Refactor `ListeningStream`:

- Override of `WriteByte` was redundant and removed
- Make `Dispose` delegate to base class

src/SharpCompress/IO/ListeningStream.cs

@@ -20,6 +20,7 @@ namespace SharpCompress.IO
             {
                 Stream.Dispose();
             }
+            base.Dispose(disposing);
         }
 
         public Stream Stream { get; }
@@ -74,10 +75,5 @@ namespace SharpCompress.IO
         {
             Stream.Write(buffer, offset, count);
         }
-
-        public override void WriteByte(byte value)
-        {
-            Stream.WriteByte(value);
-        }
     }
 }