Update requirements.txt
Update requirements.txt

Add nilearn dependency for plotting
poldracklab/fmriprep,shoshber/fmriprep,chrisfilo/fmriprep,oesteban/fmriprep,poldracklab/fmriprep,oesteban/preprocessing-workflow,oesteban/fmriprep,poldracklab/fmriprep,poldracklab/preprocessing-workflow,shoshber/fmriprep,oesteban/preprocessing-workflow,oesteban/fmriprep,poldracklab/preprocessing-workflow