Test with nondeterministic ordering when iterating object data

[jg-rp]

This PR adds nondeterministic to JSONPathEnvironmentOptions and environment variables to control nondeterminism and the location of cts.json when testing for compliance. If the nondeterministic option is true, an object's entries will be shuffled prior to application of the wildcard selector, descendent segment and filter selector.

To point compliance.test.ts at a version of cts.json other than the one included as a submodule, use the JSONP3_CTS_PATH environment variable. And use JSONP3_CTS_NONDETERMINISTIC to enable nondeterminism for compliance.test.ts.

For example, in bash:

JSONP3_CTS_PATH=/tmp/jsonpath-compliance-test-suite/cts.json JSONP3_CTS_NONDETERMINISTIC=true npm test -- compliance

[jg-rp]

Benchmarks show no discernible difference between calling Object.entries() and the extra redirection from calling JSONPathEnvironment.entries() when iterating objects. So there's no reason not to merge this.