update dummy migration files

spec/dummy/db/migrate/20180102162311_add_header_logo_meta_to_library_group.rb

@@ -1,4 +1,4 @@
-class AddHeaderLogoMetaToLibraryGroup < ActiveRecord::Migration[4.2]
+class AddHeaderLogoMetaToLibraryGroup < ActiveRecord::Migration[5.2]
   def change
     add_column :library_groups, :header_logo_meta, :text
   end

spec/dummy/db/migrate/20191219122214_create_custom_properties.rb

@@ -0,0 +1,12 @@
+class CreateCustomProperties < ActiveRecord::Migration[5.2]
+  def change
+    create_table :custom_properties do |t|
+      t.integer :resource_id, null: false
+      t.string :resource_type, null: false
+      t.text :label, null: false
+      t.text :value
+
+      t.timestamps
+    end
+  end
+end

spec/dummy/db/schema.rb

@@ -369,6 +369,15 @@
     t.index ["work_id"], name: "index_creates_on_work_id"
   end
 
+  create_table "custom_properties", force: :cascade do |t|
+    t.integer "resource_id", null: false
+    t.string "resource_type", null: false
+    t.text "label", null: false
+    t.text "value"
+    t.datetime "created_at", null: false
+    t.datetime "updated_at", null: false
+  end
+
   create_table "demands", force: :cascade do |t|
     t.bigint "user_id"
     t.bigint "item_id"