Clarify version compability

One guy in the chat just asked me, if this binding is for 3.0 only, or also for 3.2.3

Author: ShalokShalom

README.md

@@ -1,6 +1,6 @@
 # Nim bindings for Godot Engine
 
-Nim bindings for Godot 3.0 based on [GDNative](https://godotengine.org/article/dlscript-here).
+Nim bindings for Godot 3 based on [GDNative](https://godotengine.org/article/dlscript-here).
 
 Documentation: https://pragmagic.github.io/godot-nim/
 
@@ -13,4 +13,4 @@ Documentation: https://pragmagic.github.io/godot-nim/
 
 This project is licensed under the MIT license. Read [LICENSE](LICENSE) file for details.
 
-Copyright (c) 2018 Xored Software, Inc.
+Copyright (c) 2018 Xored Software, Inc.