Fix browser list (for test)

[MoOx]

Recent update to caniuse database make -webkit- off by default (related to default value of autoprefixer). So tests are currently broken (by a README update).

We need to handle #32 asap & get our custom default value.

Or maybe we should adjust default value for testing purpose ?

Or both.

[bloodyowl]

we need to support -webkit- prefixing by default IMO. lots of properties are still prefixed in current safari & various versions of android

[MoOx]

v1.0.0 will rely on browserslist, so you will easily be able to handle that by yourself.
I'm not even sure we should rely on a default value, but instead enforce people to specify their own value, maybe by importing their own browser stats like caniuse recommand.

I just opened a new issue about that on browserslist browserslist/browserslist#4

[MoOx]

Well it's not really what I was thinking... postcss/autoprefixer#381

[MoOx]

Ok I updated the tests to fix that issue. Not related to -webkit-transform directly but some other -webkit.
autoprefixer defaults are still relevant. So forget this issue.