data.load_intervals() was returning a deprecation
warning from using a deprecated pandas sort function.
The function is now updated to use the recommended version.
Coverage remained the same at 64.258% when pulling f8356bc6cb7295f8fbf128c44166fdbf448c9fb5 on dylandaniels:deprecation-fix into b9da18453895ed305f06b7572bc7716c3288920f on berkeley-stat222:master.
data.load_intervals() was returning a deprecation warning from using a deprecated pandas sort function. The function is now updated to use the recommended version.