Feature request: Make "env update" update to the latest package versions matching spec

[Hoeze]

Hi, would it be possible to implement a flag that allows updating to the latest package versions still matching the spec?

At the moment, I am running something like this to update my environments:

micromamba env update -f env.yaml -n myenv
micromamba update -f env.yaml -n myenv

However, this approach takes long, as it requires 2x solving and 2x installing.
More importantly, it makes it difficult to predict the outcome, as a --dry-run is not possible this way.

Therefore, my dream solution would be a --latest flag like this:

micromamba env update -f env.yaml -n myenv --latest --dry-run