Semantic walker doesn't fire exitOperation or exitModelProperty

[bterlson]

Describe the bug

The emit is missing from these methods.

Reproduction

navigateType(someModel, {
  exitModelProperty() { /* never fired */ }
})

navigateType(someOperation, {
  exitOperation() { /* never fired */ }
})

Checklist

• Follow our Code of Conduct
• Check that there isn't already an issue that request the same bug to avoid creating a duplicate.
• Check that this is a concrete bug. For Q&A open a GitHub Discussion.
• The provided reproduction is a minimal reproducible example of the bug.

[bterlson]

Would be good to spot check the other methods to make sure no other emits are missing.