Fix types for validateWebhook

Author: aron

index.d.ts

@@ -279,7 +279,7 @@ declare module "replicate" {
           signature?: string;
         },
     secret: string
-  ): boolean;
+  ): Promise<boolean>;
 
   export function parseProgressFromLogs(logs: Prediction | string): {
     percentage: number;

index.test.ts

@@ -1179,7 +1179,7 @@ describe("Replicate client", () => {
       // This is a test secret and should not be used in production
       const secret = "whsec_MfKQ9r8GKYqrTwjUPD8ILPZIo2LaLaSw";
 
-      const isValid = validateWebhook(request, secret);
+      const isValid = await validateWebhook(request, secret);
       expect(isValid).toBe(true);
     });