Make options arg optional.

[OmgImAlexis]

Since both functions use options = {} there's no need to force the options argument.

This now allows the following.

import * as fdir from 'fdir';

fdir.async('/').then(files => {
    console.log(files);
});

Where as before you'd need to pass an empty second param.

import * as fdir from 'fdir';

fdir.async('/', {}).then(files => {
    console.log(files);
});

[thecodrr]

Hey, thanks for this. Must have slipped my observation!