update README

README.md

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+# EnjuInventory
+[![CircleCI](https://circleci.com/gh/next-l/enju_inventory.svg?style=svg)](https://circleci.com/gh/next-l/enju_inventory)
+[![Coverage Status](https://coveralls.io/repos/github/next-l/enju_inventory/badge.svg?branch=master)](https://coveralls.io/github/next-l/enju_inventory?branch=master)
+[![security](https://hakiri.io/github/next-l/enju_inventory/master.svg)](https://hakiri.io/github/next-l/enju_inventory/master)
+
+This project rocks and uses MIT-LICENSE.
+
+## 製作者・貢献者 (Authors and contributors)
+* [TANABE, Kosuke](https://github.com/nabeta) ([@nabeta](https://twitter.com/nabeta))
+* [Project Next-L](https://www.next-l.jp) ([@ProjectNextL](https://twitter.com/ProjectNextL))
+

spec/dummy/db/migrate/20190311154610_create_periodicals.rb

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+class CreatePeriodicals < ActiveRecord::Migration[5.2]
+  def change
+    create_table :periodicals, id: :uuid do |t|
+      t.text :original_title, null: false
+      t.references :frequency, foreign_key: true, null: false
+
+      t.timestamps
+    end
+  end
+end

spec/dummy/db/migrate/20190312033839_create_periodical_and_manifestations.rb

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+class CreatePeriodicalAndManifestations < ActiveRecord::Migration[5.2]
+  def change
+    create_table :periodical_and_manifestations do |t|
+      t.references :periodical, foreign_key: true, type: :uuid, null: false
+      t.references :manifestation, foreign_key: true, type: :uuid, null: false
+      t.boolean :periodical_master, default: false, null: false, index: {where: 'periodical_master IS true', unique: true}
+
+      t.timestamps
+    end
+  end
+end

spec/dummy/db/migrate/20190314151124_add_full_name_translations_to_create.rb

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+class AddFullNameTranslationsToCreate < ActiveRecord::Migration[5.2]
+  def change
+    add_column :creates, :full_name_translations, :jsonb, default: {}
+    add_column :realizes, :full_name_translations, :jsonb, default: {}
+    add_column :produces, :full_name_translations, :jsonb, default: {}
+  end
+end