Setup conda-latest and conda-pinned environments
See &2 for rationale.
The simple idea is to have a list with pinned dependencies that are guaranteed to work, and a list with unpinned dependencies (except for <
for upgrades we know are breaking).
The crux is to organize this is some way that does not double the amount of files where we specify dependencies already. Possibly we can make two plain text files and a tool that transforms them into the necessary files (plus a test that checks if all the files match up?).
Edited by Miron van der Kolk