CleanWebpackPlugin插件在每次构建前用于清理 /dist文件夹，按webpack官网中文文档说明配置如下：
const CleanWebpackPlugin = require('clean-webpack-plugin');
module.exports = {
...
plugins: [
new CleanWebpackPlugin(['dist'])
]
};
报错：CleanWebpackPlugin is not a constructor
解决方法如下：
const { CleanWebpackPlugin } = require('clean-webpack-plugin');
module.exports = {
...
plugins: [
new CleanWebpackPlugin()
]
};