Use Mix.shell().info()

Author: solnic

mix.exs

@@ -138,7 +138,7 @@ defmodule Sentry.Mixfile do
     if Version.match?(System.version(), ">= 1.16.0") do
       run_integration_tests("phoenix_app", args)
     else
-      IO.puts("Skipping integration tests for Elixir versions < 1.16")
+      Mix.shell().info("Skipping integration tests for Elixir versions < 1.16")
     end
   end