Fix withSentryAPI type

Author: Luca Forstner

packages/nextjs/src/index.types.ts

@@ -30,8 +30,7 @@ export declare function flush(timeout?: number | undefined): PromiseLike<boolean
 export declare function lastEventId(): string | undefined;
 export declare function getSentryRelease(fallback?: string): string | undefined;
 
-interface ApiRouteHandler {
-  (...args: any[]): any;
-}
-
-export declare function withSentryAPI(handler: ApiRouteHandler, parameterizedRoute: string): ApiRouteHandler;
+export declare function withSentryAPI<H extends (...args: any[]) => any>(
+  handler: H,
+  parameterizedRoute: string,
+): (...args: Parameters<H>) => Promise<ReturnType<H>>;