Make item titles not required by changesets

Fixes a bug where items without titles could not be marked as read

lib/frenzy/item.ex

@@ -59,7 +59,7 @@ defmodule Frenzy.Item do
           url: String.t(),
           read: boolean(),
           read_date: DateTime.t(),
-          title: String.t(),
+          title: String.t() | nil,
           tombstone: boolean(),
           feed: Frenzy.Feed.t() | Ecto.Association.NotLoaded.t(),
           inserted_at: NaiveDateTime.t(),
@@ -70,6 +70,6 @@ defmodule Frenzy.Item do
   def changeset(item, attrs) do
     item
     |> cast(attrs, [:guid, :title, :url, :creator, :date, :content, :read, :read_date, :tombstone])
-    |> validate_required([:guid, :title, :url, :date, :content, :feed])
+    |> validate_required([:guid, :url, :date, :content, :feed])
   end
 end

lib/frenzy_web/controllers/item_controller.ex

@@ -44,7 +44,7 @@ defmodule FrenzyWeb.ItemController do
         read_date: Timex.now()
       })
 
-    Repo.update(changeset)
+    {:ok, item} = Repo.update(changeset)
     redirect(conn, to: Routes.item_path(Endpoint, :show, item.id))
   end