docker_stack uses outdated way of using psych's YAML.safe_load

Describe the Bug

This module inherited a bug in PDK which causes the docker_stack resource to ungracefully fail with a "wrong number of arguments" error while calling psych's YAML.safe_load.

See the following issues:

https://github.com/puppetlabs/pdk/issues/1143
https://github.com/ruby/psych/discussions/571

It looks like this issue was fixed in 2021, however, this module is still using the old way of calling safe_load in both of these resources. Any recent installation of psych (which is a dependency of the PDK) will error out.

Expected Behavior

I should be able to use docker_stack without an error.

Steps to Reproduce

Deploy a docker_stack resource with a version of psych greater than 4 on the host system. You can see the version of the gem installed in /opt/puppetlabs/puppet/lib/ruby/gems/3.2.0/gems although your installed version of ruby may be different.

Environment

• Version 9.1
• Platform Ubuntu 22

Additional Context

Add any other context about the problem here.

Start with the docker_stack resources and locate both YAML.safe_load calls. Reproduce with Psych greater than 4 on the stated Ubuntu 22 environment, then verify the docker_stack resource completes without the wrong-number-of-arguments error.