Update to Tailwind 2

[benface]

• Refactor the project to be a preset
  • Rename to @benface/tailwindcss-preset?
• Remove these options:
  • purge
  • target
  • prefix
  • important
  • separator
  • theme
  • extendTheme
  • variants
  • extendVariants
  • corePlugins
  • plugins
• Replace tailwindcss-aspect-ratio by @tailwindcss/aspect-ratio
• Remove tailwindcss-background-extended since Tailwind now includes background-image and background-clip utilities
• Remove tailwindcss-gap?
  • Either use the space-* utilities or the gap-* ones
• Remove tailwindcss-gradients?
  • At least remove the linear gradient utilities
• Replace tailwindcss-typography by @tailwindcss/typography
• Add @tailwindcss/line-clamp
• Add @tailwindcss/forms?
  • Make it optional?
• Review the latest default config and make sure we keep everything useful
  • Add the 2xl screen
  • Don't override colors
    • But ensure that transparent, current, black, and white are always included, even when overridden in the config that uses this preset (is that possible?)
    • If not possible, create a new option called bareColors to only include these colors
  • Make sure every value in spacing is included, including px (stop renaming it to 1px)
  • Don't override borderRadius
    • But ensure that none and full are always included if possible
  • Don't override boxShadow
    • But ensure that none is always included if possible
  • Don't override fontFamily
  • Don't override fontSize
    • But ensure that base is always included (and customizable!) if possible
  • Don't override fontWeight
  • Don't override letterSpacing
    • But ensure that normal is always included if possible
  • Don't override lineHeight
    • But ensure that none is always included if possible (as well as normal, if it can be customizable?)
  • Update inset to include the spacing values (and the negative ones)
  • Update maxWidth to use the breakpoints() closure and include the new values
  • Update minWidth and width to include the new values (e.g. min-content, max-content, etc.)
  • Add ringColor and customize the DEFAULT value to not refer to a Tailwind color
    • Make it black?
    • Change the default borderColor to the same color for consistency and to make it obvious that there is a border, in case it was a mistake?
  • Change all instances of default to DEFAULT
  • Update rotate and skew to include the new, smaller values
  • Make sure every value in transitionDelay is included
    • Don't override them, and get rid of maxTransitionDelay and transitionDelayStep?
    • Or just change transitionDelayStep to 50, like transitionDurationStep?
  • Update translate to include the spacing values (and the negative ones)
  • Stop disabling the divide and space core plugins?
  • Add all the custom variants added by plugins to variantOrder
  • Update variants to include all core plugins
• Change fractions to decimals except for percentages (e.g. 1/2em => 0.5em, 1/2vw => 0.5vw, etc.)