Right now publishBrakeman just takes one argument, the Brakeman report file.

it would be wonderful if you could also specify the status thresholds via this publishBrakeman step.

Using step, I can set some of these but it's pretty ugly:

step([$class: 'BrakemanPublisher', canComputeNew: false, failedTotalAll: '0', healthy: '', outputFile: 'brakeman-output.tabs', unHealthy: '', unstableTotalAll: '0'])

IMHO the same argument names could be used, but I would omit the healthy/unhealthy thresholds since I find those to be much less useful in a Pipeline-context