Format

Author: code-shoily

.formatter.exs

@@ -1,4 +1,4 @@
 # Used by "mix format"
 [
-  inputs: ["mix.exs", "{config,lib,test}/**/*.{ex,exs}"]
+  inputs: ["mix.exs", "{lib,test}/**/*.{ex,exs}"]
 ]

lib/2015/day_10.ex

@@ -18,7 +18,7 @@ defmodule AdventOfCode.Y2015.Day10 do
     input
     |> String.graphemes()
     |> Enum.chunk_by(&Function.identity/1)
-    |> Enum.map_join("", fn ([n | _] = lst) ->
+    |> Enum.map_join("", fn [n | _] = lst ->
       "#{length(lst)}#{n}"
     end)
   end

mix.exs

@@ -5,7 +5,7 @@ defmodule AdventOfCode.MixProject do
     [
       app: :advent_of_code,
       version: "0.20.0",
-      elixir: "~> 1.12",
+      elixir: "~> 1.13.0-rc.0",
       start_permanent: Mix.env() == :prod,
       deps: deps()
     ]