fix legacy type issues

src/SharpCompress/Common/Rar/RarCryptoWrapper.cs

@@ -58,7 +58,14 @@ internal sealed class RarCryptoWrapper : Stream
         return count;
     }
 
-    public override async Task<int> ReadAsync(
+    public override Task<int> ReadAsync(
+        byte[] buffer,
+        int offset,
+        int count,
+        CancellationToken cancellationToken
+    ) => ReadAndDecryptAsync(buffer, offset, count, cancellationToken);
+
+    private async Task<int> ReadAndDecryptAsync(
         byte[] buffer,
         int offset,
         int count,

src/SharpCompress/Compressors/BZip2/BZip2Stream.Async.cs

@@ -5,7 +5,7 @@ using System.Threading.Tasks;
 
 namespace SharpCompress.Compressors.BZip2;
 
-public sealed partial class BZip2Stream
+public sealed partial class BZip2Stream : IAsyncDisposable
 {
     /// <summary>
     /// Asynchronously finalizes the BZip2 compressed stream, flushing all pending data.

src/SharpCompress/Compressors/BZip2/CBZip2OutputStream.Async.cs

@@ -6,7 +6,7 @@ using System.Threading.Tasks;
 
 namespace SharpCompress.Compressors.BZip2;
 
-internal sealed partial class CBZip2OutputStream
+internal sealed partial class CBZip2OutputStream : IAsyncDisposable
 {
     private readonly byte[] bsAsyncWriteBuffer = new byte[1];
 

src/SharpCompress/Compressors/PPMd/PpmdStream.cs

@@ -10,7 +10,7 @@ using SharpCompress.Compressors.PPMd.I1;
 
 namespace SharpCompress.Compressors.PPMd;
 
-public class PpmdStream : Stream
+public class PpmdStream : Stream, IAsyncDisposable
 {
     private readonly PpmdProperties _properties;
     private readonly Stream _stream;