All the migrations have been updated to use BIGINTs for ID fields in the DB, but ActiveRecord needs to be told to treat those values as BIGINT as well. This PR does that.
* Implement BlacklistedEmailDomain * Use Faker::Internet.domain_name * Remove note column * Add frozen_string_literal comment * Delete unnecessary codes * Sort alphabetically * Change of wording * Rename BlacklistedEmailDomain to EmailDomainBlock