Add missing async field to twig Parameters

types/twig/index.d.ts

@@ -17,6 +17,7 @@ export interface Parameters {
     method?: any;
     options?: any;
     data?: any;
+	async?: any;
 }
 
 export interface Template {

types/twig/twig-tests.ts

@@ -14,7 +14,8 @@ const params: twig.Parameters = {
 	method: value,
 	name: value,
 	options: value,
-	href: value
+	href: value,
+	async: value
 };
 
 const temp: twig.Template = twig.twig(params);