upgrade puppets

package.json

@@ -133,7 +133,7 @@
     "sloc": "^0.2.1",
     "tstest": "^0.4.10",
     "typedoc": "^0.16.11",
-    "wechaty-puppet-mock": "^0.20.2"
+    "wechaty-puppet-mock": "^0.20.4"
   },
   "files_comment__whitelist_npm_publish": "http://stackoverflow.com/a/8617868/1123955",
   "files": [

src/puppet-config.ts

@@ -13,7 +13,7 @@ export const PUPPET_DEPENDENCIES = {
    * Wechaty Internal Puppets: dependenced by package.json
    */
   'wechaty-puppet-hostie'    : '^0.6.1',   // https://www.npmjs.com/package/wechaty-puppet-hostie
-  'wechaty-puppet-mock'      : '^0.20.2',   // https://www.npmjs.com/package/wechaty-puppet-mock
+  'wechaty-puppet-mock'      : '^0.20.4',   // https://www.npmjs.com/package/wechaty-puppet-mock
 
   /**
    * Wechaty External Puppets