pass processed buffer 'as T'

Signed-off-by: jace-roell <[email protected]>

packages/imperative/src/io/src/IO.ts

@@ -293,7 +293,7 @@ export class IO {
                 bufferList.push(currentByte);
                 prevByte = currentByte;
             }
-            processed = Buffer.from(bufferList);
+            processed = Buffer.from(bufferList) as T;
             return processed;
         }
     }