Bump version to 0.20.0 (#130)

Author: ahyatt

llm.el

@@ -5,7 +5,7 @@
 ;; Author: Andrew Hyatt <[email protected]>
 ;; Homepage: https://github.com/ahyatt/llm
 ;; Package-Requires: ((emacs "28.1") (plz "0.8") (plz-event-source "0.1.1") (plz-media-type "0.2.1"))
-;; Package-Version: 0.19.1
+;; Package-Version: 0.20.0
 ;; SPDX-License-Identifier: GPL-3.0-or-later
 ;;
 ;; This program is free software; you can redistribute it and/or