json-model is causing side effects on the schema (altering it) When run against the official JSON-schema test suite

[ebdrup]

I've generated a report of what tests in the official JSON-schema test suite cause side effects when run through json-model:

https://github.com/Muscula/json-schema-benchmark/blob/master/reports/json-model-side-effects.md

The schema object is mutated by json-model