我安装了 webpack^3.0.0 和 webpack-dev-server^2.9.1 （在项目上和全局上）。在项目根目录中运行时webpack-dev-server，出现错误
Invalid configuration object. webpack-dev-server has been initialised
using a configuration object that does not match the API schema.
- configuration has an unknown property 'error'. These properties are
valid:
object { hot?, hotOnly?, lazy?, bonjour?, host?, allowedHosts?,
filename?, publicPath?, port?, socket?, watchOptions?, headers?,
clientLogLevel?, overlay?, progress?, key?, cert?, ca?, pfx?,
pfxPassphrase?, requestCert?, inline?, disableHostCheck?, public?,
https?, contentBase?, watchContentBase?, open?, useLocalIp?, openPage?,
features?, compress?, proxy?, historyApiFallback?, staticOptions?,
setup?, before?, after?, stats?, reporter?, noInfo?, quiet?, …