mikropml 1.7.1

• Allow training_frac equal to 1... really this time! (#360, @pschloss)
• Note: the maximum xgboost version supported is 1.7 (see #362).
• Fix SummarizedExperiment export (#368, #370, @kelly-sovacool).
• A container is now available in ghcr (#364, #366, @kelly-sovacool).
  • see https://github.com/SchlossLab/mikropml/pkgs/container/mikropml.

Full Changelog: v1.7.0...v1.7.1