MAPG-199 fix issues found by PHPStan

src/Util/JwtParser.php

@@ -11,7 +11,7 @@ class JwtParser
         }
     }
 
-    public function setToken(string $token)
+    public function setToken(string $token): void
     {
         $this->token = explode('.', str_replace(['_', '-'], ['/', '+'], $token));
     }