Rename the "Ets" config storage to "ETS"

lib/broadway/config_storage.ex

@@ -1,8 +1,6 @@
 defmodule Broadway.ConfigStorage do
   @moduledoc false
 
-  alias Broadway.ConfigStorage.{Ets, PersistentTerm}
-
   @doc """
   Optional setup for the configuration storage
   """
@@ -36,8 +34,8 @@ defmodule Broadway.ConfigStorage do
   @spec get_module() :: module()
   def get_module() do
     case Application.fetch_env!(:broadway, :config_storage) do
-      :ets -> Ets
-      :persistent_term -> PersistentTerm
+      :ets -> Broadway.ConfigStorage.ETS
+      :persistent_term -> Broadway.ConfigStorage.PersistentTerm
       mod -> mod
     end
   end

lib/broadway/config_storage/ets.ex

@@ -1,4 +1,4 @@
-defmodule Broadway.ConfigStorage.Ets do
+defmodule Broadway.ConfigStorage.ETS do
   @moduledoc false
 
   @behaviour Broadway.ConfigStorage

test/broadway/config_storage_test.exs

@@ -1,6 +1,7 @@
 defmodule Broadway.ConfigStorageTest do
   use ExUnit.Case, async: false
-  alias Broadway.ConfigStorage.Ets
+
+  alias Broadway.ConfigStorage.ETS
 
   setup do
     prev = Application.fetch_env!(:broadway, :config_storage)
@@ -12,13 +13,15 @@ defmodule Broadway.ConfigStorageTest do
 
   test "ets default options" do
     Application.put_env(:broadway, :config_storage, :ets)
-    Ets.setup()
-    assert [] = Ets.list()
-    assert Ets.put("some name", %Broadway.Topology{})
-    assert ["some name"] = Ets.list()
-    assert %Broadway.Topology{} = Ets.get("some name")
-    assert :ets.info(Ets.table(), :size) == 1
-    Ets.delete("some name")
-    assert :ets.info(Ets.table(), :size) == 0
+    ETS.setup()
+    assert [] = ETS.list()
+
+    assert ETS.put("some name", %Broadway.Topology{})
+    assert ["some name"] = ETS.list()
+    assert %Broadway.Topology{} = ETS.get("some name")
+    assert :ets.info(ETS.table(), :size) == 1
+
+    ETS.delete("some name")
+    assert :ets.info(ETS.table(), :size) == 0
   end
 end