Update to 0.07
    
    - New upstream release 0.07
      - Reverted back to using the Warning event type, since the bug in the Test2
        core that caused this to be a problem has since been fixed
      - Replaced use of Test2::Bundle::Extended with Test2::V0
    - Package new document CODE_OF_CONDUCT.md
    - Modernize spec using %{make_build} and %{make_install}