copy a ref to setTimeout function

Former-commit-id: b76738b5649fff5fd85300caceb0b36306a7c720

lib/single-file/modules/css-fonts-alt-minifier.js

@@ -21,13 +21,14 @@
  *   Source.
  */
 
-/* global window, setTimeout */
+/* global window */
 
 this.singlefile.lib.modules.fontsAltMinifier = this.singlefile.lib.modules.fontsAltMinifier || (() => {
 
 	const singlefile = this.singlefile;
 
 	const FontFace = window.FontFace;
+	const setTimeout = window.setTimeout;
 
 	const REGEXP_URL_SIMPLE_QUOTES_FN = /url\s*\(\s*'(.*?)'\s*\)/i;
 	const REGEXP_URL_DOUBLE_QUOTES_FN = /url\s*\(\s*"(.*?)"\s*\)/i;