[skip ci] conform to updated SpikeRegressors interface
[skip ci] conform to updated SpikeRegressors interface

oesteban/fmriprep,oesteban/preprocessing-workflow,poldracklab/fmriprep,oesteban/fmriprep,poldracklab/fmriprep,oesteban/fmriprep,poldracklab/preprocessing-workflow,poldracklab/fmriprep,poldracklab/preprocessing-workflow,oesteban/preprocessing-workflow