allow global option via command line

[eugeneware]

There's currently no way to pass in the global option via the browserify command line. Ie:

$ browserify -p [ css-modulesify -g -o bundle.css ] index.js -o bundle.js

Where index.js is a file that requires a CSS module from within node_modules. Eg:

const maxWidths = require('tachyons-max-widths');

This PR fixes this issue.

[eugeneware]

I've published this as @eugeneware/css-modulesify until this gets merged in.

[joshwnj]

thanks @eugeneware !

[joshwnj]

published as v0.27.2

[eugeneware]

Cheers!