Lacking of documentation on "toHaveAttribute"

[rphumulock]

toHaveAttribute was merged in but there is no documentation for it.

testing-library/react-testing-library#44

• react-testing-library version:
• react version:
• node version:
• npm (or yarn) version:

Relevant code or config

What you did:

What happened:

Reproduction repository:

Problem description:

Suggested solution:

[alexkrolick]

This is covered by jest-dom's documentation

https://github.com/testing-library/jest-dom#tohaveattribute

https://testing-library.com/docs/ecosystem-jest-dom