[Vuejs]-Gmap-autocomplete Pick first result on Enter key in vue

After reviewing the core files,
we can simply pass select-first-on-enter prop to gmap-autocomplete to make first location select on enter.

:select-first-on-enter=true

Here is the updated component usage.

<gmap-autocomplete :value="value"
                   :select-first-on-enter="true"
                   @place_changed="setPlace"
></gmap-autocomplete>