Allows user to provide absolute URLs for upload.

[NeoXtreme]

Prepend API URL only if provided URL is relative. So that "https://uploads.github.com" can be supplied for uploading release assets. User can upload file by doing something like following:

function upload_zip($repo_name, $release_id, $file_name, $file_path)
{
    global $api;  //Global instance of API class, better to use it as a member of some wrapper class, just for example here.

    $up_url = 'https://uploads.github.com/repos/alcanttor/'.$repo_name.'/releases/'.$release_id.'/assets?name='.$file_name;

    $up_header = ['Content-Type' => 'application/zip'];

    $response = $api->post($up_url, file_get_contents($file_path), [], $up_header);

    if($response->getCode() != 201)
        return false;
    else
        return true;
}

[milo]

Thank you for the PR @NeoXtreme , but I fixed it in a slightly different way.

[NeoXtreme]

Thank you for the update. I am using your library for github script for our in-house projects, that is when I needed to make this patch. I will now update to the latest patch from your repo.