PATH on windows

[veewee]

In the Repository constructer there is following default option:

'environment_variables' => $is_windows ? array( 'PATH' => $_SERVER['PATH'] ) : array(),

This causes a notice on windows:

Notice: Undefined index: PATH in ...../Repository.php on line 123

The path variable can be accessed as following:

getenv('PATH') ?: getenv('Path')

[lyrixx]

Thanks @veewee for the bug report.

Are you able to provide a PR ?

[veewee]

Sure! Added PR #83

[alexandresalome]

Fixed by #97