[BUG] SfSelect - not reacting on v-model change

[patzick]

Describe the bug

SfSelect takes v-model and on mounted sets selected values. But if v-model is changed after select mounted cycle, then the component is not rendering selected element.

How to reproduce
Steps to reproduce the behavior:

1. Display select with an empty v-model property
2. then set v-model property on parent component to pass

Expected behavior
A clear and concise description of what you expected to happen.

The parent can fully control which option is selected by changing the value passed by v-model

Screenshots
If applicable, add screenshots to help explain your problem.

[DonNicoJs]

Fixed by: #572