message: feat: added readme toc
diff: [![Downloads/week](https://img.shields.io/npm/dw/<%= pjson.name %>.svg)](https://npmjs.org/package/<%= pjson.name %>)
  [![License](https://img.shields.io/npm/l/<%= pjson.name %>.svg)](https://github.com/<%= repository %>/blob/master/package.json)
  +<!-- toc -->
  <!-- install -->
  <!-- usage -->
  <!-- commands -->
  