CamDavidsonPilon/lifelines: v0.25.6

0.25.6 - 2020-10-26 New features Parametric Cox models can now handle left and interval censoring datasets. Bug fixes "improved" the output of add_at_risk_counts by removing a call to plt.tight_layout() - this works better when you are calling add_at_risk_counts on multiple axes, but it is recommended you call plt.tight_layout() at the very end of your script. Fix bug in KaplanMeierFitter's interval censoring where max(lower bound) < min(upper bound).