Bump to 0.4.0 (#128)

Author: Jefffrey

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "orc-rust"
-version = "0.3.1"
+version = "0.4.0"
 edition = "2021"
 homepage = "https://github.com/datafusion-contrib/datafusion-orc"
 repository = "https://github.com/datafusion-contrib/datafusion-orc"