Hopefully this aids in getting the package correctly listed in GNU
ELPA.
* lisp/progmodes/xref.el (Version): Bump to 1.0.1
(Package-Requires): Require project 0.1.1.
;; xref.el --- Cross-referencing commands -*-lexical-binding:t-*-
;; Copyright (C) 2014-2020 Free Software Foundation, Inc.
-;; Version: 1.0.0
-;; Package-Requires: ((emacs "26.3") (project "0.1"))
+;; Version: 1.0.1
+;; Package-Requires: ((emacs "26.3") (project "0.1.1"))
;; This is a GNU ELPA :core package. Avoid functionality that is not
;; compatible with the version of Emacs recorded above.