Update version and changelog

Author: nmichel

CHANGELOG.md

@@ -1,6 +1,6 @@
 # Changelog
 
-## [0.4.0] - 
+## [0.4.0] - 2024-12-05
 
 ### Added
 
@@ -35,8 +35,8 @@
 
 - First release.
 
-
 # Diff
+[0.4.0](https://github.com/nmichel/ex_grammar/releases/tag/v0.4.0)
 [0.3.0](https://github.com/nmichel/ex_grammar/releases/tag/v0.3.0)
-[0.1.0](https://github.com/nmichel/ex_grammar/releases/tag/v0.1.0)
 [0.2.0](https://github.com/nmichel/ex_grammar/releases/tag/v0.2.0)
+[0.1.0](https://github.com/nmichel/ex_grammar/releases/tag/v0.1.0)

mix.exs

@@ -1,7 +1,7 @@
 defmodule Project do
   use Mix.Project
 
-  @version "0.3.0"
+  @version "0.4.0"
 
   def project do
     [