Add mamba support

[nh13]

I have found that using mamba for dependency solving complex environments MUCH faster. You previously mentioned you may be convinced to add support. I am making a separate issue to track this.

[goanpeca]

Sure @nh13 I will add a flag just to see how things work, however there is the issue of using conda-forge which is where mamba lives. So I need to check if I need to also change the default channel to point to conda-forge instead of anaconda defaults.

[jaimergp]

I'd be tremendously interested in this! Let me know if I can help somehow.

[goanpeca]

Hi @jaimergp

Thanks for the interest.

It is just a matter of adding the option for it and installing it. :-)

I guess

mamba-version. To have control over what version to use and then replace the conda command with mamba.

Want to tackle it? PRs welcome

[jaimergp]

Thanks for your answer!

What do you think of this approach using Minimamba? https://quantstack.net/mamba.html

[goanpeca]

Fixed by #47