Missing documentation

[nwoltman]

There is no documentation for the jsx-one-expression-per-line rule (#1497).

Also, the readme is missing a link to the documentation for the button-has-type rule (#1525).

[jseminck]

Thanks for reporting this! I added the link to button-has-type rule.

@TSMMark since you wrote the code for the jsx-one-expression-per-line rule, would you be willing to add the documentation as well?

[TSMMark]

Sure thing. Anything I need to do other than the following?

• add a file in docs/rules/
• update readme with a link

[jseminck]

That's it 👍

[TSMMark]

See #1552