phpstan fixes

src/JWTToken.php

@@ -10,8 +10,8 @@ use NoccyLabs\SimpleJWT\Key\KeyInterface;
  * 
  * 
  * 
- * @property-read header PropertyBag
- * @property-read claim PropertyBag
+ * @property-read PropertyBag $header 
+ * @property-read PropertyBag $claims 
  */
 class JWTToken
 {
@@ -30,7 +30,8 @@ class JWTToken
      * Constructor
      * 
      * 
-     * @param KeyInterface The key used to sign the token
+     * @param KeyInterface $key The key used to sign the token
+     * @param string|null $token Token data
      */
     public function __construct(KeyInterface $key, ?string $token=null)
     {
@@ -127,6 +128,8 @@ class JWTToken
                 case 'm':
                     $fact = 60;
                     break;
+                default:
+                    throw new \InvalidArgumentException();
             }
             $this->header->set('exp', time() + (intval($match[1]) * $fact));
         } else {