Add missing Autoprefixer options

[tedw]

Based on #32

Autoprefixer docs https://github.com/postcss/autoprefixer#features

[tdreyno]

Thanks @tedw. I'll let @porada merge this, but if he's away for a while, shoot me an email ([email protected]) and I can get this release out.

[tedw]

@tdreyno Thanks!

Just realized one of the tests failed. I admit, I didn't clone locally and check first as I thought this would be a simple fix. Seems to be a whitespace issue fwiw.

I’m not a Ruby dev, just know enough to use Middleman, so may need someone else to help figure out why that test is failing.

[tdreyno]

Yeah, looks like white space from the autoprefixer. Was all left aligned before, is now aligned around the colon. Either find a way to revert to the old indentation, or update the test to match the indentation.