- Added the option to set/get the discount of an invoice or invoice item
- Added the option to get clients by email
- Altered the class to reflect changes in the API
- Added clients/is_european call to check if country is an European country
- Added isVatValid call to check if VAT number is valid
- ...
- Changed endpoint to https://app.defactuur.be/api
- Made the class available through composer
- Made it compliant with PSR
- Code styling