ElixirLS - the Elixir Language Server

Thanks for your work!

I tried other editors and extensions for Elixir, but this is the best.

Unfortunately, after upgrading to version 0.21.0 the vscode extension makes the computer unresponsive when using behaviours.

After I downgraded back to version 0.20.0, the vscode extension is usable again.
Seems others have the same issue.