Upgrade to tailwind 1.x

[psbanka]

According to this comment, we need to upgrade ember-cli-addon-docs to tailwind v1.0 in order to take advantage of Tailwind's configuration directive which will allow us to turn off the preflight base styles by adding a configuration option of

corePlugins: {
  container: false,
  preflight: false
}

to address the core issue found in #178

[RobbieTheWagner]

LGTM! @samselikoff any concerns with this?

[samselikoff]

Nice work Peter!

I think this still doesn't allow users to disable base styles yet right? That will be another feature?

[psbanka]

That's right @samselikoff — I'm working on a follow-up PR right now to make the inclusion of the presets configurable.