Brew install of php56-couchbase is out of date

$ brew  info php56-couchbase

homebrew/php/php56-couchbase: stable 2.0.7, HEAD

Provides fast access to documents stored in a Couchbase Server.

https://pecl.php.net/package/couchbase

/usr/local/Cellar/php56-couchbase/2.0.7 (2 files, 90.7K) *

  Built from source

From: https://github.com/Homebrew/homebrew-php/blob/master/Formula/php56-couchbase.rb

==> Dependencies

Build: autoconf ✔

Required: php56 ✔, libcouchbase ✔

==> Options

--with-igbinary

        Build with igbinary support

--without-config-file

        Do not install extension config file

--without-homebrew-php

        Ignore homebrew PHP and use default instead

--HEAD

        Install HEAD version

==> Caveats

To finish installing couchbase for PHP 5.6:

  * /usr/local/etc/php/5.6/conf.d/ext-couchbase.ini was created,

    do not forget to remove it upon extension removal.

  * Validate installation via one of the following methods:

  *

  * Using PHP from a webserver:

  * - Restart your webserver.

  * - Write a PHP page that calls "phpinfo();"

  * - Load it in a browser and look for the info on the couchbase module.

  * - If you see it, you have been successful!

  *

  * Using PHP from the command line:

  * - Run `php -i "(command-line 'phpinfo()')"`

  * - Look for the info on the couchbase module.

  * - If you see it, you have been successful!