Bump plugin version to 3.4

Author: 2shady4u

demo/addons/godot-sqlite/plugin.cfg

@@ -3,5 +3,5 @@
 name="Godot SQLite"
 description="GDNative wrapper for SQLite (Godot 3.2+), making it possible to use SQLite databases as data storage in all your future games."
 author="Piet Bronders & Jeroen De Geeter"
-version="3.3"
+version="3.4"
 script="godot-sqlite.gd"