chore: Fix failing test (#340)

Author: jimsynz

test/mix/tasks/igniter.phx.install_test.exs

@@ -8,7 +8,7 @@ defmodule Mix.Tasks.Igniter.Phx.InstallTest do
 
   test "create files" do
     igniter = Igniter.compose_task(test_project(), "igniter.phx.install", ["my_app"])
-    assert Enum.count(igniter.rewrite.sources) == 47
+    assert Enum.count(igniter.rewrite.sources) == 49
   end
 
   test "inject config" do