replace arrow function with function declare

src/compiler/parse/state/fragment.ts

@@ -3,8 +3,11 @@ import mustache from './mustache';
 import tag from './tag';
 import text from './text';
 
-export default (parser: Parser) =>
-	[
-		{ match: '<', fragment: tag },
-		{ match: '{', fragment: mustache }
-	].find(({ match }) => parser.match(match))?.fragment ?? text;
+export default function fragment(parser: Parser) {
+	return (
+		[
+			{ match: '<', fragment: tag },
+			{ match: '{', fragment: mustache }
+		].find(({ match }) => parser.match(match))?.fragment ?? text
+	);
+}