Class "SMSApi\Client" not found: need to downgrade smsapi php client

Hi,
This package is not compatible with smsapi/php-client version ^3.0.
Please remove "^3.0" from composer.json, as it introduces breaking API changes.

For other users: As a temporary fix, you can add the following requirement to your composer.json:
 "smsapi/php-client": "^1.8"
