fix: use new ignore_missing_sub_formatters option in rewrite

this resolves case where a nested formatter file is added after
its parent .formatter.exs that references it

fixes #154

lib/igniter.ex

@@ -106,7 +106,11 @@ defmodule Igniter do
       rewrite:
         Rewrite.new(
           hooks: [Igniter.Rewrite.DotFormatterUpdater],
-          dot_formatter: Rewrite.DotFormatter.read!(nil, ignore_unknown_deps: true)
+          dot_formatter:
+            Rewrite.DotFormatter.read!(nil,
+              ignore_unknown_deps: true,
+              ignore_missing_sub_formatters: true
+            )
         )
     }
     |> include_existing_elixir_file(".igniter.exs", required?: false)

lib/igniter/rewrite/dot_formatter_updater.ex

@@ -21,7 +21,10 @@ defmodule Igniter.Rewrite.DotFormatterUpdater do
   end
 
   defp dot_formatter(project) do
-    case DotFormatter.read(project, ignore_unknown_deps: true) do
+    case DotFormatter.read(project,
+           ignore_unknown_deps: true,
+           ignore_missing_sub_formatters: true
+         ) do
       {:ok, dot_formatter} -> dot_formatter
       {:error, _error} -> DotFormatter.default()
     end

mix.exs

@@ -95,7 +95,7 @@ defmodule Igniter.MixProject do
   # Run "mix help deps" to learn about dependencies.
   defp deps do
     [
-      {:rewrite, "~> 1.0"},
+      {:rewrite, "~> 1.1 and >= 1.1.1"},
       {:glob_ex, "~> 0.1.7"},
       {:spitfire, "~> 0.1 and >= 0.1.3"},
       {:sourceror, "~> 1.4"},