Bump version to 0.4.0 (#246)

Author: axelson

CHANGELOG.md

@@ -1,5 +1,7 @@
 ### Unreleased
 
+### v0.4.0: 16 May 2020
+
 Improvements:
 - Add autocompletion of struct fields on a binding when we know for sure what type of struct it is. (thanks [Łukasz Samson](https://github.com/lukaszsamson)) [#202](https://github.com/elixir-lsp/elixir-ls/pull/202)
   - For details see the [Code Completion section of the readme](https://github.com/elixir-lsp/elixir-ls/tree/a2a1f38bf0f47e074ec5d50636d669fae03a3d5e#code-completion)

apps/debugger/mix.exs

@@ -4,7 +4,7 @@ defmodule ElixirLS.Debugger.Mixfile do
   def project do
     [
       app: :debugger,
-      version: "0.3.3",
+      version: "0.4.0",
       build_path: "../../_build",
       config_path: "config/config.exs",
       deps_path: "../../deps",

apps/elixir_ls_utils/mix.exs

@@ -4,7 +4,7 @@ defmodule ElixirLS.Utils.Mixfile do
   def project do
     [
       app: :elixir_ls_utils,
-      version: "0.3.3",
+      version: "0.4.0",
       build_path: "../../_build",
       config_path: "../../config/config.exs",
       deps_path: "../../deps",

apps/language_server/mix.exs

@@ -4,7 +4,7 @@ defmodule ElixirLS.LanguageServer.Mixfile do
   def project do
     [
       app: :language_server,
-      version: "0.3.3",
+      version: "0.4.0",
       elixir: ">= 1.7.0",
       build_path: "../../_build",
       config_path: "config/config.exs",