Upgrade guide

Vacancies

The vacancy types of contractype, work_regime and type changed from text to array, meaning that they can now contain one or more string values. The naming of the parameters also changed to indicate that they contain more than one value.

"types": [
    "Arbeider",
    "Bediende"
],
"contract_types": [
    "Onbepaalde duur",
    "Zelfstandig"
],
"work_regimes": [
    "Voltijds",
    "Halftijds"
]