fix(aria-allowed-roles): allow role=radio on img with non-empty name (#…

…3320)

* adds role=radio to img alt=foo allowances

A `role=radio` was meant to be an allowance for an `img alt=foo`, but it had mistakenly been left out of the spec.
ARIA in HTML is fixing this oversight, w3c/html-aria#381, so this PR is to match this added allowance.

* odd whitespace fix

* Update html-elms.js

* add test for img element with valid role=radio

* Update aria-allowed-role.json

lib/standards/html-elms.js

@@ -358,6 +358,7 @@ const htmlElms = {
           'menuitemradio',
           'option',
           'progressbar',
+          'radio',
           'scrollbar',
           'separator',
           'slider',

test/integration/rules/aria-allowed-role/aria-allowed-role.html

@@ -227,6 +227,11 @@ <h1 id="pass-h1-valid-role" role="none"></h1>
   aria-labelledby="image-baz"
   id="pass-img-valid-role-aria-labelledby"
 />
+<img
+	role="radio"
+	aria-label="test"
+	id="pass-img-valid-role-radio"
+>
 <img role="text" aria-label="foo" id="fail-img-invalid-role-aria-label" />
 <img role="spinbutton" title="bar" id="fail-img-invalid-role-title" />
 <img

test/integration/rules/aria-allowed-role/aria-allowed-role.json

@@ -78,6 +78,7 @@
     ["#pass-img-valid-role-aria-label"],
     ["#pass-img-valid-role-title"],
     ["#pass-img-valid-role-aria-labelledby"],
+    ["#pass-img-valid-role-radio"],
     ["#pass-imgmap-1"],
     ["#pass-imgmap-2"]
   ],