Added old definition as version specific definition

through2/through2-0.4.2.d.ts

@@ -0,0 +1,26 @@
+// Type definitions for through2 v 0.4.2
+// Project: https://github.com/rvagg/through2
+// Definitions by: Bart van der Schoor <https://github.com/Bartvds>, jedmao <https://github.com/jedmao>
+// Definitions: https://github.com/borisyankov/DefinitelyTyped
+
+/// <reference path="../node/node.d.ts" />
+
+declare module 'through2' {
+
+	import stream = require('stream');
+
+	function through2(transform?: (chunk: any, enc: string, callback: () => void) => void, flush?: () => void): NodeJS.ReadWriteStream;
+
+	function through2(opts?: stream.DuplexOptions, transform?: (chunk: any, enc: string, callback: () => void) => void, flush?: () => void): NodeJS.ReadWriteStream;
+
+	module through2 {
+
+		export function obj(transform?: (chunk: any, enc: string, callback: () => void) => void, flush?: () => void): NodeJS.ReadWriteStream;
+
+		export function push(data: any): void;
+
+	}
+
+	export = through2;
+
+}