Add typings for messages option

Author: mcchrish

index.d.ts

@@ -63,6 +63,12 @@ declare interface FastifyJWTOptions {
   decode?: jwt.DecodeOptions;
   sign?: jwt.SignOptions;
   verify?: jwt.VerifyOptions;
+  messages?: {
+    badRequestErrorMessage?: string;
+    noAuthorizationInHeaderMessage?: string;
+    authorizationTokenExpiredMessage?: string;
+    authorizationTokenInvalid?: ((err: Error) => string) | string;
+  }
 }
 
 declare const fastifyJWT: fastify.Plugin<http.Server, http.IncomingMessage, http.ServerResponse, FastifyJWTOptions>;

type.test.ts

@@ -13,7 +13,13 @@ app.register(fastifyJwt, {
     },
     decode: {
         complete: true
-    }
+    },
+    messages: {
+        badRequestErrorMessage: 'Bad Request',
+        noAuthorizationInHeaderMessage: 'No Header',
+        authorizationTokenExpiredMessage: 'Token Expired',
+        authorizationTokenInvalid: (err) => `${err.message}`
+   }
 });
 
 app.addHook("preHandler", async (request, reply) =>