Add DOM prop definition

Author: lounsbrough

lib/rules/no-unknown-property.js

@@ -26,6 +26,7 @@ const DOM_ATTRIBUTE_NAMES = {
   crossorigin: 'crossOrigin',
   for: 'htmlFor',
   nomodule: 'noModule',
+  displaystyle: 'displayStyle',
 };
 
 const ATTRIBUTE_TAGS_MAP = {
@@ -34,7 +35,7 @@ const ATTRIBUTE_TAGS_MAP = {
   checked: ['input'],
   // image is required for SVG support, all other tags are HTML.
   crossOrigin: ['script', 'img', 'video', 'audio', 'link', 'image'],
-  displaystyle: ['math'],
+  displayStyle: ['math'],
   // https://html.spec.whatwg.org/multipage/links.html#downloading-resources
   download: ['a', 'area'],
   fill: [ // https://developer.mozilla.org/en-US/docs/Web/SVG/Attribute/fill