修复Mac下的命令行注释启动

bin/index.js

@@ -1,5 +1,5 @@
-#! node
+#!/usr/bin/env node
 "use strict";
 Object.defineProperty(exports, "__esModule", { value: true });
-var koa_1 = require("./koa");
+const koa_1 = require("./koa");
 new koa_1.Koa();

bin/index.ts

@@ -1,4 +1,4 @@
-#! node
-import { Koa } from "./koa";
+#!/usr/bin/env node
 
+import { Koa } from "./koa";
 new Koa()