Fixes binary operators not properly handling indexers

Upsilon/Parser/Parser.cs

@@ -390,6 +390,8 @@ namespace Upsilon.Parser
                 left = ParsePrimaryExpression();
             }
 
+            left = HandleComplexExpression(left);
+
             while (true)
             {
                 var precedence = Current.Kind.BinaryOperatorPrecedence();