Nuxt 3 Support

[harlan-zw]

Hey 👋 It looks like this module hasn't been updated for Nuxt 3. In an effort to improve the developer experience of modules, I've updated the module to clarify that it only supports Nuxt 2.

If Nuxt 3 support is added it will be moved to the https://github.com/nuxt-modules organisation.

cc: @icarito Please let me know if you need a hand with anything otherwise no action is needed.