wepy开发小程序插件，miniprogram内使用原生，plugin功能使用wepy，报错如下：
插件配置( 编译后路径 /plugin/plugin.json )：

{
  "publicComponents": {
    "promotionindex": "pages/promotions/promotion"
  },
  "main": "index.js"
}

插件代码 ( 编译后路径 /plugin/pages/promotions/promotion )：
小程序配置插件（编译后路径 /miniprogram/app.json）：

{
  "pages": [
    "pages/index/index"
  ],
  "plugins": {
    "myPlugin": {
      "version": "dev",
      "provider": "xxxxxxxxxxxxxxxxxxx"
    }
  }
}

模块调用插件配置（ 编译后路径  /miniprogram/pages/index/index.json）：

{
  "usingComponents": {
    "promotion": "plugin://myPlugin/promotionindex"
  }
}

project.config.json:

{
   "description": "A WePY project",
   "setting": {
      "urlCheck": true,
      "es6": false,
      "postcss": false,
      "minified": false,
      "newFeature": true
   },
   "compileType": "plugin",
   "appid": "xxxxxxxxxxxxxx",
   "projectname": "mpp-plugin",
   "miniprogramRoot": "./miniprogram",
   "pluginRoot": "./plugin",
   "condition": {}
}