Merge branch 'update-deps' into 'develop'

Update to Phoenix 1.6, Elixir 1.11, and chase dependencies

See merge request pleroma/pleroma!3766

test/pleroma/object/fetcher_test.exs

@@ -166,7 +166,7 @@ defmodule Pleroma.Object.FetcherTest do
       Instances.set_consistently_unreachable(id)
       refute Instances.reachable?(id)
 
-      {:ok, object} =
+      {:ok, _object} =
         Fetcher.fetch_object_from_id("http://mastodon.example.org/@admin/99541947525187367")
 
       assert Instances.reachable?(id)

test/pleroma/web/activity_pub/object_validators/attachment_validator_test.exs

@@ -11,6 +11,19 @@ defmodule Pleroma.Web.ActivityPub.ObjectValidators.AttachmentValidatorTest do
   import Pleroma.Factory
 
   describe "attachments" do
+    test "fails without url" do
+      attachment = %{
+        "mediaType" => "",
+        "name" => "",
+        "summary" => "298p3RG7j27tfsZ9RQ.jpg",
+        "type" => "Document"
+      }
+
+      assert {:error, _cng} =
+               AttachmentValidator.cast_and_validate(attachment)
+               |> Ecto.Changeset.apply_action(:insert)
+    end
+
     test "works with honkerific attachments" do
       attachment = %{
         "mediaType" => "",