Support omitting dependency versions in module.xml; will default to *

[isc-dchui]

Description

• Resolves If version for dependent module is not provided consider * as a version #408
• Removed the "requires" tag on version and versionstring
• Added default of "*"

Testing

New integration test: Test.PM.Integration.DepNoVersion

Checklist

• This branch has the latest changes from the main branch rebased or merged.
• Changelog entry added.
• Unit (zpm test -only) and integration tests (zpm verify -only) pass.
• Style matches the style guide in the contributing guide.
• Documentation has been/will be updated
  • Source controlled docs, e.g. README.md, should be included in this PR and Wiki changes should be made after this PR is merged (add an extra issue for this if needed)
• Pull request correctly renders in the "Preview" tab.