Update to v0.4.0?

Author: Zuzu-Typ

setup.py

@@ -28,7 +28,7 @@
     # Versions should comply with PEP440.  For a discussion on single-sourcing
     # the version across setup.py and the project code, see
     # https://packaging.python.org/en/latest/single_source_version.html
-    version='0.3.0',
+    version='0.4.0',
 
     description='A simple to use interface to the XInput API for Python',