iview TypeError [ERR_INVALID_CALLBACK]: Callback must be a function

1. 运行npm run dev报错
   
2. 原因：node.js/npm版本较高
3. 找到报错所指的位置：G:\workspace-vsCode\iviewDemo\webpack.dev.config.js:10:8
   将fs.write(fd, buf, 0, buf.length, 0, function(err, written, buffer) {});改成fs.write(fd, buf, 0, 'utf-8', function(err, written, buffer) {});
4. 如图