Test only the newest Python 2 and 3.
Test only the newest Python 2 and 3.

ramansbach/cluster_analysis,HBClab/xnat_BIDS,christiancarballo/bha,emaudes/bha,geoffbacon/semrep,ramansbach/cluster_analysis,ramansbach/cluster_analysis,neurohackweek/avalanche,mekman/recon,mfalkiewicz/diffusion_embed,INCF/pybids,uwescience/shablona,HBClab/NiBetaSeries,geoffbacon/semrep,arokem/shablona,ramansbach/cluster_analysis,HBClab/NiBetaSeries