remove empty comments

lib/single-file/single-file-core.js

@@ -2031,7 +2031,7 @@ this.singlefile.lib.core = this.singlefile.lib.core || (() => {
 		}
 
 		static removeCssComments(stylesheetContent) {
-			return stylesheetContent.replace(/\/\*(.|\s)+?\*\//g, "");
+			return stylesheetContent.replace(/\/\*(.|\s)*?\*\//g, "");
 		}
 
 		static wrapMediaQuery(stylesheetContent, mediaQuery) {