update exported evaluator to be 'extendable' version

[brendanbond]

Link to Jira Ticket

n/a

Description

The exported evaluator was not "extendable," meaning it did have a registerEvaluator method. This PR updates the export.

Breaking Changes / Backwards Compatibility

n/a

Dependencies

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How has this PR been tested?

n/a

Checklist:

• I have completed the above PR template
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation (if applicable)
• My changes generate no new warnings
• My changes include tests that prove my fix is effective (or that my feature works as intended)
• New and existing unit/integration tests pass locally with my changes
• Any dependent changes have corresponding PRs that are listed above

[ZenMasterJacob20011]

lgtm