title: How select 1 element in listing of custom-control-input items
body: <p>In  @vue/cli 4.0.5 / vuejs app I have listing of items and I have with custom checkbox
  to select only 1 item. I do like</p>
  
  <pre><code>    &lt;tr v-for="nextUsersAssignedToTask in usersAssignedToTask" :key="nextUsersAssignedToTask.id" &gt;
  
          &lt;td class="text-center"&gt;
              &lt;input
                      type="checkbox"
                      class="custom-control-input"
                      :name="'custom_selected_users_assigned_to_task_id_'+nextUsersAssignedToTask.id"
                      :id="'custom_selected_users_assigned_to_task_id_'+nextUsersAssignedToTask.id"
                      :value="'custom_selected_users_assigned_to_task_id_'+nextUsersAssignedToTask.id"
                      v-model="selected_users_assigned_to_task_id"
              &gt;
  </code></pre>
  
  <p>But when I select/deselect 1 item 
  1) my selected_users_assigned_to_task_id var has value true/false, but I expected got value nextUsersAssignedToTask.id
  2) all elements are selected/deselected, not 1 as I need
  Which is valid way?</p>