Allow custom components in jsx-no-target-blank

[gbakernet]

What is this?

The following PR allows for customising additional components used jsx-no-target-blank.
Closes #1075

Why do this

It's reasonable common for projects to implement <Link> or <Hyperlink> components and use them literally instead of <a> elements.

How does it work

From the docs

components

An array specifying the names of additional components that should also be validated.
Each array element can either be a string with the component name or object specifying the name and url attribute:

When using an object like so:

{
  "name": "Link",
  "linkAttribute": "to"
}

The following patterns are considered errors:

var Hello = <Link target='_blank' to="http://example.com/"></Link>
var Hello = <Link target='_blank' to={ dynamicLink }></Link>

The following patterns are not considered errors:

var Hello = <Link target='_blank' rel='noopener noreferrer' to="http://example.com"></Link>
var Hello = <Link target='_blank' to="relative/path/in/the/host"></Link>
var Hello = <Link target='_blank' to="/absolute/path/in/the/host"></Link>
var Hello = <Link />

When you use a string such as 'Link', it's equivalent to:

{
  "name": "Link",
  "linkAttribute": "href"
}

[ljharb]

This seems good, but maybe we should add something to the overall settings so that all rules that care about links can use the same list. https://github.com/yannickcr/eslint-plugin-react#configuration

[gbakernet]

@ljharb I'm not too familiar with all the specific rules. A quick search for 'a' only yielded this rule, so I'm not sure what settings might look like given the additionally complexity of the href link attribute option.

[ljharb]

I think the current schema for the components array would work fine as a plugin-level setting; we can enhance it in the future as needed.

[gbakernet]

I've updated the settings as I think you intend. Please let me know if you need any further changes.

[gbakernet]

Is there anything else I can do to this PR?

[EvHaus]

Nice new feature! I just recommended a few documentation changes below.

[EvHaus]

LGTM