Switches URL polyfill to whatwg-url

Author: mhassan1

eslint.config.mjs

@@ -61,6 +61,7 @@ const ignores = [
 	"polyfills/fetch/polyfill.js",
 	"polyfills/smoothscroll/polyfill.js",
 	"polyfills/~html5-elements/polyfill.js",
+	"polyfills/URL/polyfill.js",
 
 	// Vendored mocha
 	"test/polyfills/mocha/**",