chore(flipper): update config for flipper 1.3

config/initializers/flipper.rb

@@ -52,12 +52,13 @@ Flipper.configure do |config|
     Flipper::Adapters::ActiveSupportCacheStore.new(
       Flipper::Adapters::ActiveRecord.new,
       ActiveSupport::Cache::MemoryStore.new,
-      expires_in: 10.seconds
+      10.seconds
     )
   end
 end
 
 Rails.application.configure do
+  config.flipper.actor_limit = 500 # default is 100 but hide_instructeur_email feature has ~478
   # don't preload features for /assets/* but do for everything else
   config.flipper.preload = -> (request) { !request.path.start_with?('/assets/', '/ping') }
   config.flipper.strict = Rails.env.development?