Setting the tether to attach right.

[nypinstripes]

Hey @selvagsz was wondering if you could tell me how i might, via a config option or something, set (or force) the tether element to align to to the right of the trigger, so the tether will grow to the left.

Thanks.

[selvagsz]

the attachments are hard-coded at the moment https://github.com/selvagsz/react-power-select/blob/master/src/Dropdown.js#L11-L12

tether options can be supported as config.