add v3.3 support info to README

Author: dcastil

README.md

@@ -18,7 +18,7 @@ twMerge('px-2 py-1 bg-red hover:bg-dark-red', 'p-3 bg-[#B91C1C]')
 // → 'hover:bg-dark-red p-3 bg-[#B91C1C]'
 ```
 
--   Supports Tailwind v3.0 up to v3.2 (if you use Tailwind v2, use [tailwind-merge v0.9.0](https://github.com/dcastil/tailwind-merge/tree/v0.9.0))
+-   Supports Tailwind v3.0 up to v3.3 (except line-height shorthand, tracked in [#211](https://github.com/dcastil/tailwind-merge/issues/211); if you use Tailwind v2, use [tailwind-merge v0.9.0](https://github.com/dcastil/tailwind-merge/tree/v0.9.0))
 -   Works in all modern browsers and Node >=12
 -   Fully typed
 -   [Check bundle size on Bundlephobia](https://bundlephobia.com/package/tailwind-merge)