puppet-os-hardening 2.3.0

Implemented enhancements:

• Use CINC (instead of InSpec 4) #212
• move to github actions #264 (schurzi)
• fixed alignment of properties and indentation #263 (hp197)
• Added manage_system_users option and formatted properties #262 (hp197)
• use new syntax for stub in rspec #259 (schurzi)
• Move from inspec to cinc #238 (mcgege)

Fixed bugs:

• Fix Travis tests #255
• add source for chef-utils gem (bundle confusion) #265 (mcgege)