Puppet-firewalld uses deprecated stdlib's functions

[KrzysztofHajdamowicz]

Warning: This method is deprecated, please use the stdlib validate_legacy function,
                    with Stdlib::Compat::String. There is further documentation for validate_legacy function in the README. at ["/etc/puppetlabs/code/environments/production/modules/firewalld/manifests/custom_service.pp", 45]
Warning: This method is deprecated, please use the stdlib validate_legacy function,
                    with Stdlib::Compat::Array. There is further documentation for validate_legacy function in the README. at ["/etc/puppetlabs/code/environments/production/modules/firewalld/manifests/custom_service.pp", 54]
Warning: This method is deprecated, please use the stdlib validate_legacy function,
                    with Stdlib::Compat::Absolute_Path. There is further documentation for validate_legacy function in the README. at ["/etc/puppetlabs/code/environments/production/modules/firewalld/manifests/custom_service.pp", 62]

Puppet 5.5.10, crayfishx-firewalld (v3.4.0), puppetlabs-stdlib (v4.25.1)

[alexjfisher]

This was fixed in #172, but a new release is needed.