If entity's health is less/more than given threshold (or has lost/gain).
- hpLess (double, default .5): threshold that it'll check for
- target (string, default null): entity that's health will be compared (if unset, checks the host)
- range (double, default 10): area that it checks for entity
- more (bool, default false): checks if entity is more than instead of less than
- change (bool, default false): checks if it has changed compared to starting heatlh instead