Is your feature request related to a problem? Please describe...

Feature

Almost all my front end uses bootstrap-vue components, for now I use another datepicker for this reasons.
Be able to pick only months.
Can choose date and time in one component.

I want to change to bootstrap-vue datepicker to decrease maintenance and have a more coherent UI, but for that I need to be able to pick only months in the component

Describe the solution you'd like

to have a prop that let the component change it's UI to only show months instead full calendar.

I can manage to show/hide the b-timepicker component when needed, but I need to be able to only show months when the user must select only a month from a year.

Describe alternatives you've considered

Now I use https://www.npmjs.com/package/vue2-datepicker, but can't use visual validation and even passing bootstrap classes it looks differente from rest of inputs.

Additional context

for now it seems the only solution is to use date-disabled-fn to disable all the days but first or last, even though it's not an elegant solution.