replace internal module to namespace

koa/koa-1.1.2.d.ts

@@ -13,7 +13,7 @@
 /// <reference path="../node/node.d.ts" />
 /// <reference path="../cookies/cookies.d.ts" />
 
-declare module Koa {
+declare namespace Koa {
 
     // These open interfaces may be extended in an application-specific manner via declaration merging.
     // See for example method-override.d.ts (https://github.com/borisyankov/DefinitelyTyped/blob/master/method-override/method-override.d.ts)
@@ -402,7 +402,7 @@ declare module "koa" {
             writable: boolean;
     }
 
-    module koa {
+    namespace koa {
         interface BaseRequest extends IRequest {
             /**
              * Get the charset when present or undefined.

koa/koa.d.ts

@@ -20,7 +20,7 @@ declare module "koa" {
   import * as http from "http";
   import * as net from "net";
 
-  module Koa {
+  namespace Koa {
     export interface Context extends Request, Response {
         body?: any;
         request?: Request;