Fix Ruby 2.7 deprecation warning

[jcoyne]

/Users/jcoyne/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/dor-workflow-client-3.21.0/lib/dor/workflow/client.rb:42: warning: Using the last argument as keyword parameters is deprecated; maybe ** should be added to the call
/Users/jcoyne/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/dor-workflow-client-3.21.0/lib/dor/workflow/client/workflow_routes.rb:41: warning: The called method `create_workflow_by_name' is defined here

[jcoyne]

also at:

2.7.0 :002 > items.each { |item| DeleteService.destroy(item.pid) }
/opt/app/dor_services/dor_services/shared/bundle/ruby/2.7.0/gems/dor-workflow-client-3.23.1/lib/dor/workflow/client.rb:42: warning: Using the last argument as keyword parameters is deprecated; maybe ** should be added to the call
/opt/app/dor_services/dor_services/shared/bundle/ruby/2.7.0/gems/dor-workflow-client-3.23.1/lib/dor/workflow/client/workflow_routes.rb:297: warning: The called method `delete_all_workflows' is defined here

[jcoyne]

The problem here is in the activesupport delegation. This should work fine in Rails 6.1: rails/rails#38023