Bug fix: Prevent enum value namespace collisions

[gnidan]

• What kind of change does this PR introduce? (Bug fix, feature, docs update, ...)

Bug fix

• What is the current behavior? (You can also link to an open issue here)

Certain enum values collide with JS's object namespace, e.g. "constructor"

• What is the new behavior (if this is a feature change)?

Only actual comparator values are identified as comparators.

[HerbCaudill]

Good catch, thanks for this PR!

Could you add a simple test or two to support the change?

[gnidan]

@HerbCaudill how's that?

[HerbCaudill]

@gnidan - thanks again for this. Better late than never, I hope! 😬