Increase version number to alpha 18 stable

Author: Jowan-Spooner

addons/dialogic/plugin.cfg

@@ -4,5 +4,5 @@ name="Dialogic"
 description="Create dialogs, characters and scenes to display conversations in your Godot games.
 https://github.com/dialogic-godot/dialogic"
 author="Jowan Spooner, Emi, Cake and more!"
-version="2.0-Alpha-18 WIP (Godot 4.3+)"
+version="2.0-Alpha-18 (Godot 4.3+)"
 script="plugin.gd"