Warnings on Elixir 1.16+ (?)

[thbar]

While upgrading our app, I stumbled upon these warnings:

warning: in order to compile .yrl files, you must add "compilers: [:yecc] ++ Mix.compilers()" to the "def project" section of erlex's mix.exs
  (mix 1.16.2) lib/mix/tasks/compile.yecc.ex:70: Mix.Tasks.Compile.Yecc.preload/1
  (mix 1.16.2) lib/mix/compilers/erlang.ex:66: Mix.Compilers.Erlang.compile/6
  (mix 1.16.2) lib/mix/task.ex:478: anonymous fn/3 in Mix.Task.run_task/5
  (mix 1.16.2) lib/mix/tasks/compile.all.ex:124: Mix.Tasks.Compile.All.run_compiler/2
  (mix 1.16.2) lib/mix/tasks/compile.all.ex:104: Mix.Tasks.Compile.All.compile/4
  (mix 1.16.2) lib/mix/tasks/compile.all.ex:93: Mix.Tasks.Compile.All.with_logger_app/2

warning: in order to compile .xrl files, you must add "compilers: [:leex] ++ Mix.compilers()" to the "def project" section of erlex's mix.exs
  (mix 1.16.2) lib/mix/tasks/compile.leex.ex:69: Mix.Tasks.Compile.Leex.preload/1
  (mix 1.16.2) lib/mix/compilers/erlang.ex:66: Mix.Compilers.Erlang.compile/6
  (mix 1.16.2) lib/mix/task.ex:478: anonymous fn/3 in Mix.Task.run_task/5
  (mix 1.16.2) lib/mix/tasks/compile.all.ex:124: Mix.Tasks.Compile.All.run_compiler/2
  (mix 1.16.2) lib/mix/tasks/compile.all.ex:104: Mix.Tasks.Compile.All.compile/4
  (mix 1.16.2) lib/mix/tasks/compile.all.ex:93: Mix.Tasks.Compile.All.with_logger_app/2

==> erlex
Compiling 2 files (.erl)
Compiling 1 file (.ex)
Generated erlex app

Opening this so we can discuss it!

[christhekeele]

This project now lives here; these warnings should be fixed in the recent release—try mix deps.unlock erlex; mix deps.get.