update response type to be always present

Author: ryansolid

.changeset/tender-flies-suffer.md

@@ -0,0 +1,5 @@
+---
+"@solidjs/router": patch
+---
+
+update response types to be always present

src/types.ts

@@ -2,7 +2,7 @@ import type { Component, JSX, Signal } from "solid-js";
 
 declare module "solid-js/web" {
   interface RequestEvent {
-    response?: {
+    response: {
       status?: number;
       statusText?: string;
       headers: Headers