mix gleam.test warning about dependencies

[georgesboris]

Currently, with a minimal project using the exact same setup as the example in this repo, I get the following warning when running mix gleam.test

The module gleeunit is being imported, but gleeunit, the package it
belongs to, is not a direct dependency of your package.
In a future version of Gleam this may become a compile error.

Run this command to add it to your dependencies:

gleam add gleeunit

The tests run normally since gleeunit is present on my mix dependencies.
Is this to be ignored for now? Or am I missing any setup step?

[lpil]

Hello! Duplicate of #38