Update README.md

[pingf]

add dash_echarts to the component libraries!

For adding tutorials, packages, or apps

What did you add to the README.md file?

Have you ensured your contribution adheres to the pull request guidelines of awesome? In particular:

• Not a duplicate.
• Only has awesome items. Awesome lists are curations of the best, not everything.
• Has consistent formatting and proper spelling/grammar.
  • The link and description are separated by a dash.
    Example: - [AVA](…) - JavaScript test runner.
  • The description starts with an uppercase character and ends with a period.
  • Drop all the A / An prefixes in the descriptions.
  • Consistent and correct naming. For example, Node.js, not NodeJS or node.js.

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For first time contributors...

Do you want to be added to the contributors list on the README.md file?

• [x] Yes
• [ ] No

What name would you like?

Fanchao MENG

What website would you like your name linked to?