Add declarations for stoppable 1.1

types/stoppable/index.d.ts

@@ -1,11 +1,16 @@
-// Type definitions for stoppable 1.0
+// Type definitions for stoppable 1.1
 // Project: https://github.com/hunterloftis/stoppable
 // Definitions by: Eric Byers <https://github.com/EricByers>
+//                 John Plusjé <https://github.com/jplusje>
 // Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
 
 /// <reference types="node" />
 import { Server } from 'http';
 
-declare function stoppable(server: Server, grace?: number): Server;
+interface StoppableServer extends Server {
+  stop(callback?: (e: Error, gracefully: boolean) => void): void;
+}
+
+declare function stoppable(server: Server, grace?: number): StoppableServer;
 
 export = stoppable;

types/stoppable/stoppable-tests.ts

@@ -1,8 +1,11 @@
 import * as http from 'http';
 import stoppable = require('stoppable');
 
-const server: http.Server = stoppable(http.createServer());
-server.close();
+const server = stoppable(http.createServer());
+server.stop();
 
-const server2: http.Server = stoppable(http.createServer(), 10000);
-server2.close();
+const server2 = stoppable(http.createServer(), 10000);
+server2.stop();
+
+const server3 = stoppable(http.createServer());
+server.stop((err, gracefully) => {});