start shift to making bare bash obsolete

dist/npmci.clean.d.ts

@@ -1,5 +1,7 @@
+/// <reference types="q" />
 import "typings-global";
+import * as plugins from "./npmci.plugins";
 /**
  * cleans npmci config files
  */
-export declare let clean: () => any;
+export declare let clean: () => plugins.q.Promise<{}>;