Update the JSON Schema Test Suite to version 2.0.0

[niconoe-]

Replay of the #582

[dafeder]

There are new skipped tests, particularly ref.json. Is this because of a bug that needs to be documented?

[DannyvdSluijs]

From the original PR:

Update the JSON Schema Test Suite to version 2.0.0 to fetch test suites on Draft 06 and Draft 07.
Updated validation on draft 04 since changes have been done on the test suites.

Regarding some discussions on #581 I wanted to have access to the official test-suite for draft 07. This is possible by upgrading the JSON-Schema-Test-Suite in version 2.0.0, on which Draft 04 has been upgraded too.

I required to upgrade some snippet and make evolved some tests to make pass the Draft 04 validation.

[DannyvdSluijs]

I'll close this PR for now as time has progresses and version 23.1.0 of the JSON Schem test suite is already out. I've been working on bumping the test suite on my local machine as well.
But more importantly I've been working on fixing the issues from the test and simultaniously been working on a proper test harness for http://bowtie.report which runs the JSON Schema test suite.

@niconoe- this doesn't mean you've been of great help. Thanks you for all your help in the project. 👍🏼