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- Added support for joblib 1.4.dev0 (installed from GitHub), unlocking
``Parallel(return_as="generator_unordered")``. This restores pre-joblib speed
while maintaining the very low memory footprint enabled by joblib.
- Matrices can now be sorted in tree order; call ``.reorder()`` on your matrix
without supplying a node-order and it will be put in tree order.
- PDF heatmaps traded for SVG format instead.