Tweak Rails 5 code to support LIMIT/OFFSET

[jakeonrails]

When LIMIT/OFFSET are used in a query, extract_value replaces their values with nil since the values in the query array are of type ActiveModel::Attribute::WithCastValue not ActiveRecord::Relation::QueryAttribute. I've updated the method to ask if the objects have a value method and to always call it if they do instead of querying their types.