Add property in the documentation

[Widdou]

The 'setOptions()' method is missing one property in its documentation.
The 'noEventTrigger' listed in the 'setValue()' method is also available for this method.

It's good to know when you need to initially populate the dropdown without triggering validations

[Gonçalo M.]

@Widdou For the setOptions method is there a missing parameter or a parameter (keepValue) that shouldn't even be there?
Looking into the code I can only see the parameter options = [] and there's another method called setOptionsMethod that contains also keepValue but never the one you're mentioning. Maybe I'm missing something but feel free to open a PR so @sa-si-dev can validate