Thanks for adding the ability to configure a custom exception in #531. I'm trying to use this functionality according to the specified usage, but unfortunately this returns an error:

undefined method `failure_exception=' for #<AllureCucumber::CucumberConfig:0x0000000106ed0808 @allure_config=#<Allure::Config:0x0000000106ed0678 @results_directory="reports/allure-results", @logging_level=1, @clean_results_directory=true>> (NoMethodError)

It looks like the new parameter is missing from the allure-rspec/allure-cucumber config.rb files.