[INTERNAL] ASTUtils: Add todo for SpreadElement support

Author: flovogt

lib/lbt/utils/ASTUtils.js

@@ -63,6 +63,7 @@ function isIdentifier(node, name) {
 
 function getPropertyKey(property) {
 	if ( property.type === Syntax.SpreadElement ) {
+		// TODO: Support interpreting SpreadElements
 		return;
 	} else if ( property.key.type === Syntax.Identifier && property.computed !== true ) {
 		return property.key.name;