Merge branch 'master' into glitch-soc/merge-upstream

Conflicts:
- `app/controllers/activitypub/collections_controller.rb`:
  Conflict due to glitch-soc having to take care of local-only
  pinned toots in that controller.
  Took upstream's changes and restored the local-only special
  handling.
- `app/controllers/auth/sessions_controller.rb`:
  Minor conflicts due to the theming system, applied upstream
  changes, adapted the following two files for glitch-soc's
  theming system:
  - `app/controllers/concerns/sign_in_token_authentication_concern.rb`
  - `app/controllers/concerns/two_factor_authentication_concern.rb`
- `app/services/backup_service.rb`:
  Minor conflict due to glitch-soc having to handle local-only
  toots specially. Applied upstream changes and restored
  the local-only special handling.
- `app/views/admin/custom_emojis/index.html.haml`:
  Minor conflict due to the theming system.
- `package.json`:
  Upstream dependency updated, too close to a glitch-soc-only
  dependency in the file.
- `yarn.lock`:
  Upstream dependency updated, too close to a glitch-soc-only
  dependency in the file.

app/serializers/rest/encrypted_message_serializer.rb

@@ -0,0 +1,19 @@
+# frozen_string_literal: true
+
+class REST::EncryptedMessageSerializer < ActiveModel::Serializer
+  attributes :id, :account_id, :device_id,
+             :type, :body, :digest, :message_franking,
+             :created_at
+
+  def id
+    object.id.to_s
+  end
+
+  def account_id
+    object.from_account_id.to_s
+  end
+
+  def device_id
+    object.from_device_id
+  end
+end

app/serializers/rest/keys/claim_result_serializer.rb

@@ -0,0 +1,9 @@
+# frozen_string_literal: true
+
+class REST::Keys::ClaimResultSerializer < ActiveModel::Serializer
+  attributes :account_id, :device_id, :key_id, :key, :signature
+
+  def account_id
+    object.account.id.to_s
+  end
+end

app/serializers/rest/keys/device_serializer.rb

@@ -0,0 +1,6 @@
+# frozen_string_literal: true
+
+class REST::Keys::DeviceSerializer < ActiveModel::Serializer
+  attributes :device_id, :name, :identity_key,
+             :fingerprint_key
+end

app/serializers/rest/keys/query_result_serializer.rb

@@ -0,0 +1,11 @@
+# frozen_string_literal: true
+
+class REST::Keys::QueryResultSerializer < ActiveModel::Serializer
+  attributes :account_id
+
+  has_many :devices, serializer: REST::Keys::DeviceSerializer
+
+  def account_id
+    object.account.id.to_s
+  end
+end

app/serializers/rest/preview_card_serializer.rb

@@ -6,7 +6,7 @@ class REST::PreviewCardSerializer < ActiveModel::Serializer
   attributes :url, :title, :description, :type,
              :author_name, :author_url, :provider_name,
              :provider_url, :html, :width, :height,
-             :image, :embed_url
+             :image, :embed_url, :blurhash
 
   def image
     object.image? ? full_asset_url(object.image.url(:original)) : nil