v2.1

Use project-root[s] to get project root (#4)

v2.0

It is now possible to group buffers by custom functions and regexps

v1.3

Added possibility to cache project info per directory.

v1.2.1

Don't use xor because It is added to subr.el only in Emacs 27.

v1.2

• Sort buffers by project in first place
• Buffers with name starts with asterisk are placed at the end
• Sort groups

v1.1

Use buffer-local-value instead of with-current-buffer