Stop generating last_update, and generate pretty-printed JSONs

lib/quby/compiler/instance.rb

@@ -36,7 +36,7 @@ module Quby
             roqua: Output.new(
               key: :roqua,
               filename: "roqua.json",
-              content: Outputs::RoquaSerializer.new(questionnaire).to_json,
+              content: JSON.pretty_generate(Outputs::RoquaSerializer.new(questionnaire).as_json)
             ),
             seeds: Output.new(
               key: :seeds,
@@ -46,7 +46,7 @@ module Quby
             quby_frontend_v1: Output.new(
               key: :quby_frontend_v1,
               filename: "quby-frontend-v1.json",
-              content: Outputs::QubyFrontendV1Serializer.new(questionnaire).to_json,
+              content: JSON.pretty_generate(Outputs::QubyFrontendV1Serializer.new(questionnaire).as_json),
             ),
             quby_frontend_v2: Output.new(
               key: :quby_frontend_v2,