Many projects have a Project.toml that lists test dependencies in the [extras] block, following by a
[targets]
test = [...]
block. This way, you can run julia --project in the base project directory and then ]test will automatically pull in all those dependencies.
However, for development purposes, I want to install the extra packages into the base project directory, without actually modifying Project.toml to change them into hard dependencies. Is there a way to do ]instantiate that also includes the extras? E.g. ]instantiate extras?