webpack5.0使用copy-webpack-plugin报错

Question

 ###### 问题遇到的现象和发生背景 ： 学习webpack使用copy-webpack-plugin后进行打包报错

 ###### 问题相关代码，请勿粘贴截图

const CopyPlugin = require('copy-webpack-plugin');
 plugins: [
        new CopyPlugin({patterns: [
                {
                    from: 'public',
                    to: './build'
                }
            ]   }
        )
    ],

 ###### 运行结果及报错内容

```javascript
HookWebpackError: Not supported
    at makeWebpackError (D:\index\vue3\vue3-test\webpack\test\03.webpack-file\node_modules\webpack\lib\HookWebpackError.js:48:9)
    at hooks.processAssets.callAsync.err (D:\index\vue3\vue3-test\webpack\test\03.webpack-file\node_modules\webpack\lib\Compilation.js:3055:12)
    at eval (eval at create (D:\index\vue3\vue3-test\webpack\test\03.webpack-file\node_modules\tapable\lib\HookCodeFactory.js:33:10), <anonymous>:60:1)
    at err (D:\index\vue3\vue3-test\webpack\test\03.webpack-file\node_modules\webpack\lib\Compilation.js:508:26)
    at compilation.hooks.processAssets.tapAsync (D:\index\vue3\vue3-test\webpack\test\03.webpack-file\node_modules\copy-webpack-plugin\dist\index.js:485:13)
    at process._tickCallback (internal/process/next_tick.js:68:7)

```

 ###### 我的解答思路和尝试过的方法

 ###### 我想要达到的结果