Bump xelb dependency

Author: minad

exwm.el

@@ -5,7 +5,7 @@
 ;; Author: Chris Feng <[email protected]>
 ;; Maintainer: Adrián Medraño Calvo <[email protected]>, Steven Allen <[email protected]>, Daniel Mendler <[email protected]>
 ;; Version: 0.31
-;; Package-Requires: ((emacs "27.1") (xelb "0.19") (compat "30"))
+;; Package-Requires: ((emacs "27.1") (xelb "0.20") (compat "30"))
 ;; Keywords: unix
 ;; URL: https://github.com/emacs-exwm/exwm