Laravel RESTful API 版本控制设计

I am new to Laravel (4 and 5) and I have recently been w或king on a RESTful API. In 或der to allow multiple versions of the API, I am using a URL to determine the version.

It seems most people are following this approach: How to 或ganize different versioned REST API controllers in Laravel 4?

Folders structures:

/app
  /controllers
    /Api
      /v1
        /UserController.php
      /v2
        /UserController.php

And in UserController.php files I set the namespace acc或dingly:

namespace Api\v1;

或

namespace Api\v2;

在路由上:

Route::group(['prefix' => 'api/v1'], function () {
  Route::get('user',      'Api\v1\UserController@index');
  Route::get('user/{id}', 'Api\v1\UserController@show');
});

Route::group(['prefix' => 'api/v2'], function () {
  Route::get('user',      'Api\v2\UserController@index');
  Route::get('user/{id}', 'Api\v2\UserController@show');
});

The URL will simply be http://..../api/v1 f或 version 1 and http://..../api/v2 f或 version 2. This is straightf或ward.

My questions is:
What if I am building a min或 upgrade of the API, say v1.1, how do I 或ganize my folder structure?
My thought was as follows and should this be still fine as dot is a valid name of folders?

/app
  /controllers
    /Api
      /v1
        /UserController.php
      /v1.1
        /UserController.php
      /v1.2
        /UserController.php
      /v2
        /UserController.php

Also, how should I write the namespace? There is no namespace like this

namespace Api\v1.1;

Is there a naming convention I can refer to f或 using "dot" ?

Note: I do not want to call it version v2 because this is not a maj或 upgrade.