Upgrade to Ruby 3 and Rails 7.x

v0.1.6

Upgrade to Ruby 3.x and allows up to ActiveRecord 7.x; fix all test f…

v0.1.4

Update graphviz and allow ApplicationRecord abstract class.

v0.1.3

DS-4969 Update data_works gem for Rails 5.2.6; Upgrade FactoryGirl to…

v0.1.2

Update rake gemspec and version to 0.1.2