Version 0.13.0 has been released 
This release further improves experience with reloading dependencies on branch switching. It also fixes major problems introduced in v0.12.0. Completions auto aliasing experience should now be much improved. The performance issues during build should now fixed as well. Unfortunately we had to remove a code action prefixing unused variables with _ as it broke code in many cases.
I’m also happy to announce that Steve Cohen nas joined the team. He is focusing on optimisation and refactoring of elixirLS codebase.
See full release notes
ElixirLS elixir-ls/CHANGELOG.md at v0.13.0 · elixir-lsp/elixir-ls · GitHub
vscode extension vscode-elixir-ls/CHANGELOG.md at v0.13.0 · elixir-lsp/vscode-elixir-ls · GitHub
