change(sleep): Wechaty.sleep() is a static method now.

Dockerfile

 #
 # Wechaty Docker
-# https://github.com/wechaty/wechaty
+# https://github.com/chatie/wechaty
 #
 # FROM alpine
 #

src/message.ts

@@ -186,6 +186,11 @@ export class Message implements Sayable {
   public static counter = 0
   public _counter: number
 
+  /**
+   * a map for:
+   *   1. name to id
+   *   2. id to name
+   */
   public static TYPE: MsgTypeMap = {
     TEXT:               1,
     IMAGE:              3,

src/wechaty.ts

@@ -447,8 +447,10 @@ export class Wechaty extends EventEmitter implements Sayable {
 
   /**
    * @todo document me
+   * @static
+   *
    */
-  public async sleep(millisecond: number): Promise<void> {
+  public static async sleep(millisecond: number): Promise<void> {
     await new Promise(resolve => {
       setTimeout(resolve, millisecond)
     })