修改d.ts中的类名,并添加全局方法的d.ts定义

types/drawer.d.ts

@@ -0,0 +1,8 @@
+// Type definitions for iview 3.0.1
+// Project: https://github.com/iview/iview
+// Definitions by: yangdan
+// Definitions: https://github.com/yangdan8/iview.git
+import Vue, { VNode } from 'vue';
+
+export declare class Drawer extends Vue {
+}