Add role matches methods

[WilcoFiers]

In axe-core we do a lot of role matching. Instead of writing that code over and over, we should add this role matching capability to axe.commons.matches().

I think there are three variations:

• matches(node, { semanticRole: 'listitem' })
• matches(node, { explicitRole: ['presentation', 'none'] })
• matches(node, { implicitRole: 'img' })

The semantic role is the default of aria.getRole(node), the explicitRole is aria.getRole(node, { noImplicit: true }), and implicitRole is aria.implicitRole(node).

The reason for calling it semanticRole rather than role is to avoid confusion with the role attribute.

[padmavemulapati]

devTask