Fix types error

src/types/index.ts

@@ -341,11 +341,13 @@ export type GrabTSXModuleBatchMap = {
 };
 
 export type BunextAPIRouteHandler<
-    T extends BunextAPIRouteJSONRes = BunextAPIRouteJSONRes & {
+    T extends BunextAPIRouteJSONRes = {
         [k: string]: any;
     },
 > = (params: BunxRouteParams) => Promise<Response | T> | Response | T;
 
 export type BunextAPIRouteJSONRes = {
     bunext_api_route_res_options?: ResponseInit;
+} & {
+    [k: string]: any;
 };