message: doc: add Core Maintainers and Maintainers to README.md
diff: @@ -20,10 +20,23 @@ A framework in react community.
  TODO
  +## Core Maintainers
  +
  +Core Maintainres are community members who have contributed a significant amount of time and energy to the project through issues, bug fixes, implementing enhancements/features.
  +
  +* [sorrycc](https://github.com/sorrycc)
  +* [xiaohuoni](https://github.com/xiaohuoni)
  +
  +## Maintainers
  +
  +Maintainers are community members who have 10+ PRs merged in umi, or have spend lot's of time on umi community or issues.
  +
  ## Contribution
  See [Contributing Guide](./CONTRIBUTING.md).
  +<a href="https://github.com/umijs/umi/graphs/contributors"><img src="https://opencollective.com/umi/contributors.svg?width=890&button=false" /></a>
  +
  ## LICENSE
  [MIT](./LICENSE)
  