Add rspec gem development_dependency
Add rubocop gem development_dependency
Add Validify::IdentityCode specs
Add basic utilities for loading methods
Add Validify::IdentityCode with basic functionality
Add Estonia Validify::IdentityCode specific methods from module
Add specs for Validify::IdentityCode extra methods
Add Validify::IdentityCode extra methods
Add extra check for Validify::IdentityCode#valid? method