dontThrowParseErrorOnDoctypeDeclaration: Adding additional specification for doctype tag matching

src/parse/state/tag.js

@@ -6,7 +6,7 @@ import { trimStart, trimEnd } from '../utils/trim.js';
 import { decodeCharacterReferences } from '../utils/html.js';
 import voidElementNames from '../../utils/voidElementNames.js';
 
-const validTagName = /^[a-zA-Z]{1,}:?[a-zA-Z0-9\-]*/;
+const validTagName = /^\!?[a-zA-Z]{1,}:?[a-zA-Z0-9\-]*/;
 const invalidUnquotedAttributeCharacters = /[\s"'=<>\/`]/;
 
 const specials = {

src/utils/voidElementNames.js

@@ -1 +1 @@
-export default /^(?:area|base|br|col|command|doctype|embed|hr|img|input|keygen|link|meta|param|source|track|wbr)$/;
+export default /^(?:area|base|br|col|command|\!doctype|embed|hr|img|input|keygen|link|meta|param|source|track|wbr)$/;