Emit notice logs in :console backend

yes.. this is not very "backward compatible"..
I guess adding some config flag to enable it, and
default it to false.. would be proper (?)

Author: riccardomanfrin

lib/logger/lib/logger/backends/console.ex

@@ -236,11 +236,14 @@ defmodule Logger.Backends.Console do
       info: Keyword.get(colors, :info, :normal),
       warn: Keyword.get(colors, :warn, :yellow),
       error: Keyword.get(colors, :error, :red),
+      notice: Keyword.get(colors, :error, :blue),
       enabled: Keyword.get(colors, :enabled, IO.ANSI.enabled?())
     }
   end
 
-  defp log_event(level, msg, ts, md, %{device: device} = state) do
+  defp log_event(_level, msg, ts, md, %{device: device} = state) do
+    {:erl_level, level} = List.keyfind(md, :erl_level, 0, :not_found)
+
     output = format_event(level, msg, ts, md, state)
     %{state | ref: async_io(device, output), output: output}
   end

lib/logger/lib/logger/formatter.ex

@@ -166,6 +166,7 @@ defmodule Logger.Formatter do
   defp levelpad(:debug), do: ""
   defp levelpad(:info), do: " "
   defp levelpad(:warn), do: " "
+  defp levelpad(:notice), do: " "
   defp levelpad(:error), do: ""
 
   defp metadata([{key, value} | metadata]) do