Add tests for smaller rotate and skew values

[ben-rogerson]

This PR adds tests for the new smaller rotate and skew classes in Tailwindcss@1.9.0. Further work isn't required as the updates come down the stream in the default config change from tailwindcss.

import tw from 'twin.macro'

tw`rotate-1`
tw`rotate-2`
tw`rotate-3`
tw`rotate-6`
tw`rotate-12`

tw`-rotate-1`
tw`-rotate-2`
tw`-rotate-3`
tw`-rotate-6`
tw`-rotate-12`

tw`skew-x-1`
tw`skew-x-2`

tw`-skew-x-1`
tw`-skew-x-2`

tw`skew-y-1`
tw`skew-y-2`

tw`-skew-y-1`
tw`-skew-y-2`


// ↓ ↓ ↓ ↓ ↓ ↓

({
  "--transform-rotate": "1deg"
});
({
  "--transform-rotate": "2deg"
});
({
  "--transform-rotate": "3deg"
});
({
  "--transform-rotate": "6deg"
});
({
  "--transform-rotate": "12deg"
});
({
  "--transform-rotate": "-1deg"
});
({
  "--transform-rotate": "-2deg"
});
({
  "--transform-rotate": "-3deg"
});
({
  "--transform-rotate": "-6deg"
});
({
  "--transform-rotate": "-12deg"
});
({
  "--transform-skew-x": "1deg"
});
({
  "--transform-skew-x": "2deg"
});
({
  "--transform-skew-x": "-1deg"
});
({
  "--transform-skew-x": "-2deg"
});
({
  "--transform-skew-y": "1deg"
});
({
  "--transform-skew-y": "2deg"
});
({
  "--transform-skew-y": "-1deg"
});
({
  "--transform-skew-y": "-2deg"
});