Feat Request: Support for XDG_CONFIG_HOME

[maverick1872]

Are you interested in updating the location configuration is stored, such that it would adhere to the XDG Base Directory Specification? Specifically the configuration one as I believe that's all that would be relevant for swim.

[maverick1872]

Additional ref material can be found here.

[dawsbot]

I'm not sure I understand this change @maverick1872 - would this fix a bug for some systems? If so, I'm open to a PR if it's easy for you