Allow role=combobox on more input types

[WilcoFiers]

The following should pass aria-allowed-role:

<input type="search" 
  role="combobox"
  aria-expanded="false"
  aria-label="search" />

This is allowed according to the ARIA 1.0 spec, but it isn't allowed by HTML-ARIA. Given their status, I think the ARIA spec should get priority. Since the following are combobox by default if you put a list attribute on them, I think axe-core should allow the following types to be a combobox:

• text
• search
• tel
• url
• email

[WilcoFiers]

That's actually the same as what we have here, making that consistent as well:
https://github.com/dequelabs/axe-core/blob/develop/lib/checks/aria/required-children.js#L67

[straker]

Just need to update the combobox allowedElements object in our master aria file to allow an array of types instead of a single type.

nodeName: 'input',
properties: {
  type: ['text', 'search', 'tel', 'url', 'email']
}

Then update the integration test for aria-allowed-role to include inputs of these types using role="combobox". The integration file is a bit odd in that you create an element that should pass the rule and give it a unique id. Then you'll need to update the associated integration json passes array to include each of the newly added ids in their own array.

[jeankaplansky]

@straker: This list is final? No other type values than these?:

• text
• search
• tel
• url
• email

Please confirm. Thanks!

[straker]

@jeankaplansky Should be

[padmavemulapati]

Verified with latest axe-coconut and axe, looks everything working fine