fix: tailwindcss as devDependency

[felixgeissler]

This line requires tailwindcss to be installed as a dependency rather than a devDependency:

const plugin = require('tailwindcss/plugin')

Yarn check packages with their imports and corresponding package.json entrys. This PR will make
tailwindcss-safe-area work again with Yarn projects.

[felixgeissler]

Fixes #8

[mvllow]

Thank you for the PR, that makes sense to not be a dev dependency. I've never used peer dependencies, personally, but I'm curious if this would be better as a peer instead? Perhaps we can say we need any working range of tailwindcss instead of including a potentially different version with this plugin.

[felixgeissler]

Good idea! I updated the package to be a peerDependency. I wonder though what the lowest possible version is. I would say supporting >=3.0.0 for now and investigating earlier versions on demand should be a good start.

[mvllow]

Thank you! Appreciate the revisions :)

[felixgeissler]

Happy to help 😊