Add changeset description

Author: wileykestner

.changeset/avoid_duplicating_user_defined_enum_property_names.md

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+# Avoid duplicating user-defined enum property names
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+#1168 by @wileykestner
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+The generator will now create names for properties gauranteed to avoid colliding with the names of other existing, user-defined types.
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+Resolves #1167