fix php docblock

token and signature also allow `Key` as key, not only strings

Author: prolic

src/Token.php

@@ -12,6 +12,7 @@
 use DateTimeInterface;
 use Generator;
 use Lcobucci\JWT\Claim\Validatable;
+use Lcobucci\JWT\Signer\Key;
 use OutOfBoundsException;
 
 /**
@@ -182,7 +183,7 @@ public function getClaim($name, $default = null)
      * Verify if the key matches with the one that created the signature
      *
      * @param Signer $signer
-     * @param string $key
+     * @param Key|string $key
      *
      * @return boolean
      *