Fix failing spec

[AV-room]

No description provided.

[mattoc]

try .to_json on this Hash?

[AV-room]

No dice with this, I then stumble here:

1) FatZebra::Utilities::ApplePay::Domain.register! creates the domain
     Failure/Error: payload[:test] = true if configurations.test_mode

     TypeError:
       no implicit conversion of Symbol into Integer
     # ./lib/fat_zebra/api_resource.rb:29:in `[]='
     # ./lib/fat_zebra/api_resource.rb:29:in `request'
     # ./lib/fat_zebra/utilities/apple_pay/domain.rb:33:in `register!'
     # ./spec/lib/fat_zebra/utilities/apple_pay/domain_spec.rb:27:in `block (3 levels) in <top (required)>'
     # ./spec/lib/fat_zebra/utilities/apple_pay/domain_spec.rb:35:in `block (3 levels) in <top (required)>'

[AV-room]

Updated options to be positional arg to keep invocation consistent with rest of gem.