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

Conflicts:
- `Gemfile.lock`:
  Not a real conflict, upstream updated dependencies that were too close to
  glitch-soc-only ones in the file.
- `app/controllers/oauth/authorized_applications_controller.rb`:
  Upstream changed the logic surrounding suspended accounts.
  Minor conflict due to glitch-soc's theming system.
  Ported upstream changes.
- `app/controllers/settings/base_controller.rb`:
  Upstream refactored and changed the logic surrounding suspended accounts.
  Minor conflict due to glitch-soc's theming system.
  Ported upstream changes.
- `app/controllers/settings/sessions_controller.rb`:
  Upstream refactored and changed the logic surrounding suspended accounts.
  Minor conflict due to glitch-soc's theming system.
  Ported upstream changes.
- `app/models/user.rb`:
  Upstream refactored and changed the logic surrounding suspended accounts.
  Minor conflict due to glitch-soc not preventing moved accounts from logging
  in.
  Ported upstream changes while keeping the ability for moved accounts to log
  in.
- `app/policies/status_policy.rb`:
  Upstream refactored and changed the logic surrounding suspended accounts.
  Minor conflict due to glitch-soc's local-only toots.
  Ported upstream changes.
- `app/serializers/rest/account_serializer.rb`:
  Upstream refactored and changed the logic surrounding suspended accounts.
  Minor conflict due to glitch-soc's ability  to hide followers count.
  Ported upstream changes.
- `app/services/process_mentions_service.rb`:
  Upstream refactored and changed the logic surrounding suspended accounts.
  Minor conflict due to glitch-soc's local-only toots.
  Ported upstream changes.
- `package.json`:
  Not a real conflict, upstream updated dependencies that were too close to
  glitch-soc-only ones in the file.

db/migrate/20200908193330_create_account_deletion_requests.rb

@@ -0,0 +1,8 @@
+class CreateAccountDeletionRequests < ActiveRecord::Migration[5.2]
+  def change
+    create_table :account_deletion_requests do |t|
+      t.references :account, foreign_key: { on_delete: :cascade }
+      t.timestamps
+    end
+  end
+end

db/migrate/20200917192924_add_notify_to_follows.rb

@@ -0,0 +1,19 @@
+require Rails.root.join('lib', 'mastodon', 'migration_helpers')
+
+class AddNotifyToFollows < ActiveRecord::Migration[5.1]
+  include Mastodon::MigrationHelpers
+
+  disable_ddl_transaction!
+
+  def up
+    safety_assured do
+      add_column_with_default :follows, :notify, :boolean, default: false, allow_null: false
+      add_column_with_default :follow_requests, :notify, :boolean, default: false, allow_null: false
+    end
+  end
+
+  def down
+    remove_column :follows, :notify
+    remove_column :follow_requests, :notify
+  end
+end

db/migrate/20200917193034_add_type_to_notifications.rb

@@ -0,0 +1,5 @@
+class AddTypeToNotifications < ActiveRecord::Migration[5.2]
+  def change
+    add_column :notifications, :type, :string
+  end
+end

db/migrate/20200917222316_add_index_notifications_on_type.rb

@@ -0,0 +1,7 @@
+class AddIndexNotificationsOnType < ActiveRecord::Migration[5.2]
+  disable_ddl_transaction!
+
+  def change
+    add_index :notifications, [:account_id, :id, :type], order: { id: :desc }, algorithm: :concurrently
+  end
+end