Fix that lookup tables were not available to DefinitionValidator

lib/quby/compiler/dsl/questionnaire_builder.rb

@@ -19,7 +19,7 @@ module Quby
         include StandardizedPanelGenerators
         include Helpers
 
-        def initialize(target_instance, lookup_tables: nil)
+        def initialize(target_instance, lookup_tables:)
           @questionnaire = target_instance
           @lookup_tables = lookup_tables
           @default_question_options = {}