Merge pull request #195 from carlnordenfelt/patch-1

Changed nbf to exp

README.md

@@ -109,7 +109,7 @@ $token = (new Builder())->setIssuer('http://example.com') // Configures the issu
                         ->setId('4f1g23a12aa', true) // Configures the id (jti claim), replicating as a header item
                         ->setIssuedAt(time()) // Configures the time that the token was issue (iat claim)
                         ->setNotBefore(time() + 60) // Configures the time that the token can be used (nbf claim)
-                        ->setExpiration(time() + 3600) // Configures the expiration time of the token (nbf claim)
+                        ->setExpiration(time() + 3600) // Configures the expiration time of the token (exp claim)
                         ->set('uid', 1) // Configures a new claim, called "uid"
                         ->sign($signer, 'testing') // creates a signature using "testing" as key
                         ->getToken(); // Retrieves the generated token