Addition of Differential Sensitivity/DP

[adesai90]

I am currently using the following to get the differential sensitivity:

sig_kwargs = {'energy_range': (emin_used,emax_used)}
sens = estimate_sensitivity(ana=ana,
                            rss=rss,
                            h0_trials=trials,
                            mu_range=(1,100),
                            sig_kwargs=sig_kwargs,
                            h0_ts_quantile=0.5,
                            p=0.9)

As Chiara mentioned on slack, this needs to be implemented so the Issue is created.
I am happy to test the updated version with public data when the fix is implemented, please feel free to let me know.
Thanks