[Feature Request] - add caching to the github actions CI

[lachlangrose]

💻

• Would you like to work on this feature?

Feature Description

Solving map2loop environment takes a very long time, can we cache the environment between test runs to reduce this overhead?
There is an example on the setup-miniconda documentation
https://github.com/conda-incubator/setup-miniconda

Version

n/a

[lachlangrose]

@noellehmcheng do you mind looking into this?