Use separate exceptions and other improvements

[dvdheiden]

Changes

Added

• Provide original status code and description when an exception is thrown.
• Use separate exceptions to catch specific errors. You can keep catching the OxxaException to catch all exceptions of this package.
• Add fallback to the getData method of the OxxaResult. This allows you to easily fall back to a specific value, i.e. $oxxa->products()->sslProducts()->getData('products', []);
• Add several error codes regarding domain transfers.

Checks

• The version constant is updated in Oxxa.php
• The changelog is updated