add replace()

dist/smartgulp.gulpapi.d.ts

@@ -1,4 +1,5 @@
 /// <reference types="node" />
 import { Transform } from 'stream';
 export declare let src: (minimatchPathArrayArg: string[]) => Transform;
-export declare let dest: () => void;
+export declare let dest: (dirArg: string) => void;
+export declare let replace: () => Transform;