Speedup testing about brainglobe-atlasapi

[adamltyson]

We’re testing all the python versions and OSs in parallel, so would we save any time by removing them?

If we can, I’m keen to keep all the tests, to make sure I don’t use any Linux specific functions etc (which I’ve done before).

[vigji]

Last time I check they were not all running parallel, maybe there’s more than the limit of cores (I think that 6 are running parallel but we have eight- maybe we can test only on one python cross platform).

Also, avoiding installing all dev pag ages and installing explicitly shan’t needed (I guess black and flake8?) would improve it I think

[FedeClaudi]

yeah we can test just one python version for now.

[vigji]

This should be fixed in #29 now