Fix version being required on create for rides

This was accidentally introduced in #54 and prevented us from creating
rides, since they don't have a version then as they are just about to be
created.

lib/ioki/model/passenger/ride.rb

@@ -9,7 +9,6 @@ class Ride < Base
         attribute :destination, type: :object, on: [:create, :read], class_name: 'RequestedPoint'
         attribute :passengers, type: :array, on: [:create, :read], class_name: 'RidePassenger'
         attribute :user, type: :object, on: :read, class_name: 'User'
-        attribute :version, type: :integer, on: [:read, :create, :update]
         attribute :booking, type: :object, on: :read, class_name: 'Booking'
         attribute :pickup, type: :object, on: :read, class_name: 'CalculatedPoint'
         attribute :dropoff, type: :object, on: :read, class_name: 'CalculatedPoint'

spec/ioki/passenger_api_spec.rb

@@ -92,6 +92,7 @@
     it 'calls request on the client with expected params' do
       expect(passenger_client).to receive(:request) do |params|
         expect(params[:url].to_s).to eq('passenger/rides')
+        expect(params[:body][:data]).to_not have_key(:version)
         [result_with_data, full_response]
       end