Make tests pass on GitHub actions. Node 10 doesn't support matchAll?

Author: benmccann

src/core/create_manifest_data.ts

@@ -5,9 +5,15 @@ import { Page, PageComponent, ServerRoute, ManifestData } from '../interfaces';
 import { posixify, reserved_words } from '../utils';
 
 export function template_has_preload(content: string) {
-	const matches = content.matchAll(/<script.*?context="module".*?>([^]*?)<\/script>/g);
-	for (const source of matches) {
-		const source_minus_comments = tippex.erase(source[1]);
+	const regex = /<script.*?context="module".*?>([^]*?)<\/script>/g;
+	let m;
+	while ((m = regex.exec(content)) !== null) {
+		// This is necessary to avoid infinite loops with zero-width matches
+		if (m.index === regex.lastIndex) {
+			regex.lastIndex++;
+		}
+
+		const source_minus_comments = tippex.erase(m[1]);
 		if (/export\s+.*?preload/.test(source_minus_comments)) {
 			return true;
 		}