Bump version to 0.4.0

Author: jacobtomlinson

setup.py

@@ -9,7 +9,7 @@
 
 setup(
     name="dask-deltatable",
-    version="0.3.3",
+    version="0.4.0",
     description="Dask + Delta Table ",
     url="https://github.com/dask-contrib/dask-deltatable/",
     maintainer="rajagurunath",