Updates for April 25

[bfhealy]

Announcements

The ad (Anderson-Darling statistic) and sw (Shapiro-Wilk statistic) features can now be generated using cesium (cesium-ml/cesium#320)

Pull requests

• Update requirements and installation docs #350
• Add hyperparameter grid search to XGBoost training #351
• Run XGBoost training in parallel with slurm scripts #352

Issues

• Pin more dependency versions #344
• Re-implement LS/CE/AOV period-finding sequence #353

Going forward

We will merge code used to train XGBoost on Expanse, enable feature generation on specific sources (in addition to ZTF quadrants), continue migrating features to cesium, and test the ECE, ELS and EAOV period-finding algorithms on our training set.