[FEATURE] Option to disable multi-route rendering

- Added option to disable multi-route rendering by calling `Router::setRenderMultipleRoutes($bool)`.
- Added alias for easier access `SimpleRouter::enableMultiRouteRendering($bool)`.
- Added php-unit tests for multi-routing enabled and disabled.

src/Pecee/SimpleRouter/SimpleRouter.php

@@ -532,6 +532,18 @@ class SimpleRouter
         return $route;
     }
 
+    /**
+     * Changes the rendering behavior of the router.
+     * When enabled the router will render all routes that matches.
+     * When disabled the router will stop rendering at the first route that matches.
+     *
+     * @param bool $bool
+     */
+    public static function enableMultiRouteRendering(bool $bool): void
+    {
+        static::router()->setRenderMultipleRoutes($bool);
+    }
+
     /**
      * Enable or disable dependency injection
      *