`Puppet::Network::FormatSupport` provides a `#to_pson` method, which serialized the value of the `#to_data_hash` method.  This was being leveraged by the `module build` action to generate a JSON representation of each dependency in the Modulefile.

When we migrated the `module build` action from the PSON to the JSON serializer, dependencies were being serialized as in `dependency.to_s.to_json` ([link](https://tickets.puppetlabs.com/browse/PUP-1976?focusedCommentId=63676&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-63676)); by aliasing the `to_pson` method, the dependencies are now being serialized properly.