ESLint提示“no-restricted-syntax iterators/generators require regenerator-runtime“

问题：

　　iterators/generators require regenerator-runtime, which is too heavyweight for this guide to allow them. Separately, loops should be avoided in favor of array iterations. (no-restricted-syntax)

原因：　 

不推荐使用 for-in for-of。推荐使用forEach，不想提示的话可以禁用这个rule