Allow PHPUnit 5.0

Update Docs.
Leave support for PHP 5.5

Author: jimlind

README.md

@@ -19,7 +19,7 @@ Use [Composer](https://getcomposer.org/):
 
 PHP-Mock integrates with the trait
 [`PHPMock`](http://php-mock.github.io/php-mock-phpunit/api/class-phpmock.phpunit.PHPMock.html)
-into your PHPUnit-4 test case. This trait extends the framework
+into your PHPUnit-4 or PHPUnit-5 test case. This trait extends the framework
 by the method
 [`getFunctionMock()`](http://php-mock.github.io/php-mock-phpunit/api/class-phpmock.phpunit.PHPMock.html#_getFunctionMock).
 With this method you can build a mock in the way you are used to build a

composer.json

@@ -17,8 +17,9 @@
         "psr-4": {"phpmock\\phpunit\\": "classes/"}
     },
     "require": {
+        "php": ">=5.6",
         "php": ">=5.5",
-        "phpunit/phpunit": "^4.0.0",
+        "phpunit/phpunit": "^4.0.0 || ^5.0.0",
         "php-mock/php-mock-integration": "^0.4"
     },
     "require-dev": {