Wrong type `AdvancedOptions` in `Shipment`

[Harasz]

Hello,
I notice that interface AdvancedOptions has property dryIceWeight required while all others properties are optional. I think this is incorrect, especially when all comments says that those all options are optional.

[jejrthompson]

I second this. It's making the Saturday delivery option unusable without specifying a dry ice weight. Even using dry ice weight of 0 lbs. throws the rate results.