Fix return type (the fixing)

projects/plugins/boost/app/lib/critical-css/source-providers/providers/Provider.php

@@ -82,7 +82,7 @@ public static function get_provider_name() {
 	 * Returns the ratio of valid urls from the provider source urls
 	 * for the Critical CSS generation to be considered successful.
 	 *
-	 * @return integer
+	 * @return float|int
 	 */
 	abstract public static function get_success_ratio();
 }