[jss-vendor-prefixer] Testing vendor prefixes

[kof]

The difficult part is that we need tests specific to vendors and versions, because there will be different results on different implementations. For e.g. at time of writing "animation: yyy;" test, all browsers needed a prefix, right now most of them support it unprefixed.

[kof]

We need to migrate tests there to mocha and co like in the jss repository and also add browserstack, because this really really needs a CI with real browsers.

[cvle]

I totally agree.

[kof]

I think we need to use something like this to verify the test results.

[kof]

migrated the tests

[cvle]

I think we need to use something like this to verify the test results.

Sounds like a good idea!

[AleshaOleg]

I think, it can be closed due cssinjs/css-vendor#9. We already have testing of all old major browsers via browserstack with each of property.