1.2.0: Fix enum comparison (OSK-9) (#10)

Motivation
----
Enums were found to not be getting compared as expected

Modifications
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* Removed some dead code
* Updated `PropertyComparer` to ignore enums so they can naturally
compute their equality
* Added Tests for missing use case (`EndToEnd`, updated
`PropertyComparerTests` to account for enum changes)
* Updated packages where possible
* Integrated hexagonal meta data library changes for v1, using
intermediate library for initial changes to prevent breaking change

Result
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Enum comparison is working as expected

Fixes #9