Add unminified version to the distribution

[slavafomin]

Hello!

Thanks for this library.

Could you please add unminified version of the library file to the dist directory? Right now it contains only cookies.min.js, but I would like to use cookies.js in my project.

Of course I can include it from src directory, but it's a bad practice that can potentially break compatibility (when you decide to split source into several files for example).

Thanks!