👾 ChatID for optional fields

[mymmrac]

💬 Telego version

v0.10.3

👾 Issue description

ChatID can't be empty even if it's optional

⚡️ Expected behavior

ChatID to be able to use in optional fields

🧐 Code example

// MarshalJSON returns JSON representation of ChatID
func (c ChatID) MarshalJSON() ([]byte, error) {
	if c.ID != 0 {
		return json.Marshal(c.ID)
	}

	if c.Username != "" {
		return json.Marshal(c.Username)
	}

	return nil, errors.New("chat ID and username are empty")
}

[mymmrac]

Resolved in v0.10.4