小程序拆分公共文件报错

jd_703c76354613a

vendor文件太大了，想要拆分组件，按照文档写的代码，提示this.commonChunks.includes is not a function，麻烦大佬看下怎么解决

代码：

mini: {
    webpackChain (chain, webpack) {
      chain.merge({
        optimization: {
          splitChunks: {
            cacheGroups: {
              lodash: {
                name: 'lodash',
                priority: 1000,
                test (module) {
                  return /node_modules[\\/]lodash/.test(module.context)
                }
              }
            }
          }
        }
      })
    },
    commonChunks (commonChunks) {
      commonChunks.push('lodash')
      return commonChunks
    }
  },

报错提示

/Users/Documents/gym-tim/node_modules/@tarojs/mini-runner/dist/plugins/TaroLoadChunksPlugin.js:19
                commonChunks = chunks.filter(chunk => this.commonChunks.includes(chunk.name)).reverse();
this.commonChunks.includes is not a function