pkg debendency override

Hi,

I do want to solve upgrading mu, but I also want to learn how pkg 
works.

I am on emacs-30.2,3 and mu-1.8.13_4.
I use the emacs window manager exwm as window manager, so I do not 
want to uninstall emacs.

# pkg upgrade

The following 7 package(s) will be affected (of 0 checked):

New packages to be INSTALLED:
        emacs-nox: 30.2,3 [FreeBSD]

Installed packages to be UPGRADED:
        mu: 1.8.13_4 -> 1.12.13 [FreeBSD]

Installed packages to be REMOVED:
        emacs: 30.2,3
        mu4e: 1.8.13_12
        pdf-tools: 1.1.0_14
        tablist: 1.0.13_11
        yaml.el: 1.2.1

Number of packages to be removed: 5
Number of packages to be installed: 1
Number of packages to be upgraded: 1

$ pkg rquery %do mu
databases/xapian-core
devel/readline
devel/libfmt
mail/gmime30
devel/glib20
devel/gettext-runtime
editors/emacs

$ pkg rquery %ro emacs-nox
...
mail/mu
...

My main questions are:

How do I tell pkg that emacs should be ok, no emacs-nox needed?  I 
tried pkg set -o editors/emacs-nox:editors/emacs

The last commit on mail/mu did not update the DISTVERSION or 
PORTREVISION, so how do I tell which version made it into pkg?

If the last commit made it into pkg, where does the runtime 
dependency on emacs-nox come from?  As I read 
https://cgit.freebsd.org/ports/tree/mail/mu/Makefile emacs@nox is 
only a manpages build dependency.

Best regards

Markus