Compilation error on Emacs 27

[alphapapa]

As reported by @phil-s:

​I attempted to test in Emacs 27 and found that ement-room-list doesn't byte-compile. The error is "ement-room-list.el:68:1:Error: Unknown cl-type pattern: (cl-type taxy-magit-section)", coming from the (cl-defmethod magit-section-ident-value ...) definition. I see the same installing in a fresh config. I don't know how to debug that, but potentially it's fixable for 0.15?

I can reproduce that by installing Ement 0.14 in 27.2. It does compile in 28.2. [edited]

[alphapapa]

I think that should fix it. Thank you.