Ignore non dom role attribute when checking aria usage

It's perfectly valid to use "role" as a prop for things like
React Components, but currently eslint is seeing those props
and treating it as an error.

We only really care about misused roles on actual DOM elements.

index.js

@@ -11,6 +11,7 @@ module.exports = {
     "import/extensions": "off",
     "import/no-extraneous-dependencies": "off",
     "import/no-unresolved": "off",
+    "jsx-a11y/aria-role": ["warn", { ignoreNonDOM: true }],
     "max-len": ["error", { "code": 120 }],
     "no-extra-parens": ["error", "all", { "nestedBinaryExpressions": false, "ignoreJSX": "multi-line" }],
     "no-undef": "off",