Add Zabbix 6.0 compatible version
- Use YAML import format
- Apply JavaScript object naming changes appeared in 5.4 / 6.0 (old namings are deprecated and to be removed after 6.0).
JS changes as per: https://www.zabbix.com/documentation/5.4/en/manual/introduction/whatsnew540#javascript-objects
Closes #4 (closed)