Add an option to the formatter not to move namespace to it's own line

[kaan-atakan]

Hello, I am a big fan of your vscode extension and a premium user but I tend to prefer phpfmt to the formatter included in the extension for two reasons. This is an issue about the first which is very minor:

I like to specify my namespace on the same line as the first php opening bracket like such:

<?php namespace App\Services;

// ...

but when I use your formatter it moves the namespace decleration to it's own line:

<?php 

namespace App\Services;

// ...

I would appreciate it if there was an option to disable this behavior