Added gulp-autoprefixer task to the project

[AllThingsSmitty]

Autoprefixer will help keep the CSS cleaner and free of unnecessary/outdated vendor prefixes

[alrra]

@AllThingsSmitty Thanks for the pull request, but IMHO at least, this isn't really needed for this project.

[battaglr]

AFAIK adding Autoprefixer will only allow us to remove the ::-moz-selection declaration, and depending on the browser support, the resolution/density rules —we'll only need to declare (min-resolution: 120dpi). Of course, this will be just on the src/css/main.css file.

It sure will make the CSS a bit cleaner, but not that much.

Unless I'm missing something, I'm 👍 with this.

Edited comment.

[arthurvr]

I should agree with @alrra here. We don't really need this.

[AllThingsSmitty]

I've opened PR #1682 to address the compatibility items.

[arthurvr]

@AllThingsSmitty You could also have updated this PR :)