Bump elixir-ls (#21)

jherdman · web-flow · commit cdbac7b7f9ba · 2020-06-30T02:34:24.000+04:30
v0.5.0 was released, let's use it. https://github.com/elixir-lsp/elixir-ls/blob/master/CHANGELOG.md#v050-28-june-2020
diff --git a/elixir-ls b/elixir-ls
@@ -1 +1 @@
-Subproject commit 41532b96bc316257d71650f776108b78e17fd728
+Subproject commit e50e153977af83238f196f0ab0c5aa0156c7573f
