Fix wrong stream TransformOptions interface. (#11849)

Transform streams are duplex streams and extend the latter's constructor options.

node/node-tests.ts

@@ -487,7 +487,10 @@ function simplified_stream_ctor_test() {
             chunks[0].chunk.slice(0);
             chunks[0].encoding.charAt(0);
             cb();
-        }
+        },
+        allowHalfOpen: true,
+        readableObjectMode: true,
+        writableObjectMode: true
     })
 }
 
@@ -747,7 +750,7 @@ namespace tls_tests {
             let _response: Buffer = response;
         })
         _TLSSocket = _TLSSocket.prependOnceListener("secureConnect", () => { });
-    } 
+    }
 }
 
 ////////////////////////////////////////////////////

node/node.d.ts

@@ -3276,7 +3276,7 @@ declare module "stream" {
             end(chunk: any, encoding?: string, cb?: Function): void;
         }
 
-        export interface TransformOptions extends ReadableOptions, WritableOptions {
+        export interface TransformOptions extends DuplexOptions {
             transform?: (chunk: string | Buffer, encoding: string, callback: Function) => any;
             flush?: (callback: Function) => any;
         }