Added phpunit/phpunit to composer.json file. Trying to solve PHPUnit issues on a ZF2 project (see http://www.zfnapratica.com.br/ for details)

composer.json

{
    "name": "zendframework/skeleton-application",
    "description": "Skeleton Application for ZF2",
    "license": "BSD-3-Clause",
    "keywords": [
        "framework",
        "zf2"
    ],
    "homepage": "http://framework.zend.com/",
    "require": {
        "php": ">=5.3.3",
        "zendframework/zendframework": "2.*",
        "phpunit/phpunit": "3.7.*"
    }
}