Upgrade Doorkeeper to 4.4.1 (#8197)

db/schema.rb

@@ -10,7 +10,7 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema.define(version: 2018_08_13_113448) do
+ActiveRecord::Schema.define(version: 2018_08_14_171349) do
 
   # These are extensions that must be enabled in order to support this database
   enable_extension "plpgsql"
@@ -349,6 +349,7 @@ ActiveRecord::Schema.define(version: 2018_08_13_113448) do
     t.string "website"
     t.string "owner_type"
     t.bigint "owner_id"
+    t.boolean "confidential", default: true, null: false
     t.index ["owner_id", "owner_type"], name: "index_oauth_applications_on_owner_id_and_owner_type"
     t.index ["uid"], name: "index_oauth_applications_on_uid", unique: true
   end