Domain argument for site_descriptors

[cortner]

Related to this issue

@siasolt -- do you mind trying this out.

[cortner]

If it's not clear how to try this:

• clone the ACEpotentials.jl repo
• checkout the descriptors branch
• In your project folder
  • activate the project
  • go to package manager ]
  • dev folder_to_ACEpotentials
• restart all Julia instances in which you want to test this.

[siasolt]

This worked!

[cortner]

@wcwitt -- this is a tiny and trivial change to the current implementation. Can you take a brief glance and confirm whether or not you are happy for me to merge this?

[wcwitt]

Fine with me, thanks. Hopefully my tweak will fix the CI (related: #183 (comment)).

[cortner]

registered as 0.6.4

@siasolt -- if you can now free ACEpotentials then put a version bound of 0.6.4 in your project and it should then update your manifest and packages automatically.