[elpa] externals/compat 1a2e3f8: Clarify that compat.el has not yet been published

[ELPA Syncer]

branch: externals/compat
commit 1a2e3f8c342d778b44499ff33e089554e953be68
Author: Philip Kaludercic <philipk@posteo.net>
Commit: Philip Kaludercic <philipk@posteo.net>

    Clarify that compat.el has not yet been published
---
 README.md | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/README.md b/README.md
index 1709e01..62042b6 100644
--- a/README.md
+++ b/README.md
@@ -1,6 +1,10 @@
 COMPATibility Library for Emacs
 ===============================
 
+> **Note to package developers:** compat.el hasn't yet been published,
+> and should not yet be added as a dependency.  The official release
+> of the package will coincide with the release of Emacs 28.1.
+
 Find here the source for compat.el, a forwards-compatibility library
 for (GNU) Emacs Lisp, versions 24.3 and newer.