Properties named ‘enum’ were being indexed as enums

An edge case reported in https://github.com/daveshanley/vacuum/issues/339 shows up when enums are being indexed when they are actually a property of a schema called ‘enum’.

This has been fixed.

Signed-off-by: quobix <dave@quobix.com>

index/extract_refs.go

@@ -329,6 +329,11 @@ func (index *SpecIndex) ExtractRefs(node, parent *yaml.Node, seenPath []string,
 				// capture enums
 				if n.Value == "enum" {
 
+					lastItem := seenPath[len(seenPath)-1]
+					if lastItem == "properties" {
+						continue
+					}
+
 					// all enums need to have a type, extract the type from the node where the enum was found.
 					_, enumKeyValueNode := utils.FindKeyNodeTop("type", node.Content)