(#37) Implement note rule CPMR0068

[AdmiringWorm]

Description Of Changes

This implements the note rule CPMR0068 that verifies whether the owners
field matches the authors field or not.

This is equivalent to what is implemented in Package Validator, and
should be enhanced in the future.

Motivation and Context

To include as many rules as we can that is implemented by Package Validator.

Testing

1. Create a nuspec file.
2. Update the tags element to contain the tag notSilent
3. Run choco pack on the created nuspec file.
4. Verify the rule CPMR0068 is flagged.
5. Repeat previous steps with different letter casing.

Operating Systems Testing

• Windows 10

Change Types Made

• Bug fix (non-breaking change).
• Feature / Enhancement (non-breaking change).
• Breaking change (fix or feature that could cause existing functionality to change).
• Documentation changes.
• PowerShell code changes.

Change Checklist

• Requires a change to the documentation.
• Documentation has been updated.
• Tests to cover my changes, have been added.
• All new and existing tests passed?
• PowerShell code changes: PowerShell v3 compatibility checked?

Related Issue

Fixes #37

[AdmiringWorm]

It is expected that the GHA build will fail, verify with the internal build instead.

EDIT:

PR #56 should be merged before this one