Log stderr too

Author: anaisbetts

Diff for: src/client/stdio.ts

@@ -158,6 +158,15 @@ export class StdioClientTransport implements Transport {
       this._process.stdout?.on("error", (error) => {
         this.onerror?.(error);
       });
+
+      this._process.stderr?.on("data", (chunk) => {
+        this._readBuffer.append(chunk);
+        this.processReadBuffer();
+      });
+
+      this._process.stderr?.on("error", (error) => {
+        this.onerror?.(error);
+      });
     });
   }