修改分离webpack.config.base.js 和webpack.config.client.js 后，报错：

vue-todo@1.0.0 dev D:\web学习\vue项目搭建\vue-todo
cross-env NODE_ENV=development webpack-dev-server --config build/webpack.config.client.js

Invalid configuration object. Webpack has been initialised using a configuration object that does not match the API schema.

• configuration should be one of these:
  object | [object] | {
  “instanceof”: “Promise”,
  “description”: “A promise that resolves with a configuration object, or an array of configuration objects.”
  }
  Details:
  • configuration should be an object.
    -> A webpack configuration object.
  • configuration should be an array:
    [object]
    -> An array of webpack configuration objects.
  • configuration should be an instance of {
    “instanceof”: “Promise”,
    “description”: “A promise that resolves with a configuration object, or an array of configuration objects.”
    }
    -> A promise that resolves with a configuration object, or an array of configuration objects.
    Received: undefined : undefined
    npm ERR! code ELIFECYCLE
    npm ERR! errno 4294967295
    npm ERR! vue-todo@1.0.0 dev: cross-env NODE_ENV=development webpack-dev-server --config build/webpack.config.client.js
    npm ERR! Exit status 4294967295
    npm ERR!
    npm ERR! Failed at the vue-todo@1.0.0 dev script.
    npm ERR! This is probably not a problem with npm. There is likely additional logging output above.

npm ERR! A complete log of this run can be found in:
npm ERR! C:\Users\lenovo\AppData\Roaming\npm-cache_logs\2019-05-07T12_21_15_745Z-debug.log