[BUG] Multiple return types generates wrong @return in docblock and its return, in stubs

[Jeckerson]

Examples:

Zephir

public function getModule(string! name) -> array | object

PHP

    /**
     * @return array|mixed
     */
    public function getModule(string $name): array
    {
    }

---

Zephir

public function dispatch() -> var | bool

PHP

/**
  * @return mixed
  */
  public function dispatch(): bool