New features
- new `ApproximationWarning` to tell you if the package is making an potentially mislead approximation.
Bug fixes
- fixed a bug in parametric prediction for interval censored data.
- realigned values in `print_summary`.
- fixed bug in `survival_difference_at_fixed_point_in_time_test`
API Changes
- `utils.qth_survival_time` no longer takes a `cdf` argument - users should take the compliment (1-cdf).
- Some previous `StatisticalWarnings` have been replaced by `ApproximationWarning`