bson-ruby currently implements partial serialization to extended json. Unfortunately this is done using #to_json method and this runs into problems when serializing standard library classes (e.g. Float) that have values like Infinity/NaN which are not serializable into standard json that have extended json representations.

Therefore there need to be another method added, e.g. #to_extended_json, which will return extended json and follow the extended json spec.

Test that Int32/Int64 in relaxed mode produce Integer values and not Int32/Int64