puppetlabs-powershell: Update the version compatibility to >= 4.7.0 < 5.0.0

Update the puppetlabs-powershell module version compatibility in the metadata.json to: "version_requirement": ">= 4.7.0 < 5.0.0"
The current version_requirement is listed as ">= 3.0.0 < 2016.4.0"
Source: https://github.com/puppetlabs/puppetlabs-powershell
Project: https://github.com/puppetlabs/puppetlabs-powershell
Set issues_url to https://tickets.puppetlabs.com/CreateIssueDetails!init.jspa?pid=10707&issuetype=1&team=Modules&customfield_14200=14302&labels=triage&customfield_10005=2147&summary=Issue+found+with+module%3A+puppetlabs-powershell