Add docblock

src/Middleware/Auth/AuthenticationMiddlewareTrait.php

@@ -17,6 +17,9 @@ trait AuthenticationMiddlewareTrait
      */
     private $token;
 
+    /**
+     * @param  callable(RequestInterface): ResponseInterface $next
+     */
     public function __invoke(RequestInterface $request, callable $next): ResponseInterface
     {
         return $next($request->withHeader('Authorization', (string) $this->token));

src/Middleware/Authentication.php

@@ -20,6 +20,9 @@ public function __construct(AuthenticatorInterface $authenticator)
         $this->authenticator = $authenticator;
     }
 
+    /**
+     * @param  callable(RequestInterface): ResponseInterface $next
+     */
     public function __invoke(RequestInterface $request, callable $next): ResponseInterface
     {
         return $next($this->authenticator->authenticate($request));

src/Middleware/FollowRedirects.php

@@ -53,6 +53,9 @@ public function __construct(
         $this->referer = $referer;
     }
 
+    /**
+     * @param  callable(RequestInterface): ResponseInterface $next
+     */
     public function __invoke(RequestInterface $request, callable $next): ResponseInterface
     {
         $response = $next($request);

src/Middleware/RetryRequests.php

@@ -29,6 +29,7 @@ public function __construct(RetryStrategyInterface $strategy, int $maxRetries =
     }
 
     /**
+     * @param  callable(RequestInterface): ResponseInterface $next
      * @throws \Fansipan\Exception\RequestRetryFailedException
      */
     public function __invoke(RequestInterface $request, callable $next): ResponseInterface