Missing comma

````bash
dlondero@fiji:~/Workspace$ php gush.phar 
PHP Parse error:  syntax error, unexpected '[' in phar:///Users/dlondero/Workspace/gush.phar/vendor/gushphp/gush-jira-adapter/src/JiraFactory.php on line 45
PHP Stack trace:
PHP   1. {main}() /Users/dlondero/Workspace/gush.phar:0
PHP   2. require() /Users/dlondero/Workspace/gush.phar:10
PHP   3. class_exists() phar:///Users/dlondero/Workspace/gush.phar/bin/gush:75
PHP   4. Composer\Autoload\ClassLoader->loadClass() phar:///Users/dlondero/Workspace/gush.phar/bin/gush:0
PHP   5. Composer\Autoload\includeFile() phar:///Users/dlondero/Workspace/gush.phar/vendor/composer/ClassLoader.php:269

Parse error: syntax error, unexpected '[' in phar:///Users/dlondero/Workspace/gush.phar/vendor/gushphp/gush-jira-adapter/src/JiraFactory.php on line 45

Call Stack:
    0.0176     658944   1. {main}() /Users/dlondero/Workspace/gush.phar:0
    0.0203     667456   2. require('phar:///Users/dlondero/Workspace/gush.phar/bin/gush') /Users/dlondero/Workspace/gush.phar:10
    0.0494    1521312   3. class_exists() phar:///Users/dlondero/Workspace/gush.phar/bin/gush:75
    0.0494    1521704   4. Composer\Autoload\ClassLoader->loadClass() phar:///Users/dlondero/Workspace/gush.phar/bin/gush:0
    0.0494    1521704   5. Composer\Autoload\includeFile() phar:///Users/dlondero/Workspace/gush.phar/vendor/composer/ClassLoader.php:269
````