Libmultilabel

* Documentation: https://www.csie.ntu.edu.tw/~cjlin/libmultilabel/

Contributors
Thank you all for your contributions :)

cjlin1 Eleven1Liu sian-chen henryyang42 Sinacam chihming optchliu

What's Changed

Highlights
* Add lr scheduler for LAAT (ReduceOnPlateau) (317, 320)
* Homogenizing Dropout (315)
* Extend arguments accepted by Embedding (325)

Fix bugs 🐛
* Parameter search configuration (305, 322)
* Change the storage format of node's weights to csc_matrix (324)
* Fix read_svm_format when no label is associated with an example (327)

Contributors
Thank you all for your contributions :)

cjlin1 Gordon119 Sinacam donglihe-hub ChengYehLi sammer1107 maclin726

New Contributors
Welcome ChengYehLi 🧮

What's Changed
Fix bugs 🐛
* Fix version of ray in parameter search requirement (316)
* Hotfix Glove URLs (318)

Contributors
Thank you all for your contributions :)

cjlin1 Gordon119 sian-chen Eleven1Liu

What's Changed
Fix bugs 🐛
* Fixed svm data format (313)

Contributors
Thank you all for your contributions :)

cjlin1 Sinacam

What's Changed
Document
* Update GridSearchCV tutorial: [link](https://www.csie.ntu.edu.tw/~cjlin/libmultilabel/auto_examples/plot_linear_gridsearch_tutorial.html)

Highlights
* Rewrite Linear Preprocessor (310)

Others
* For developers: Migrate code style to Black (307)
* Minor bugs fixed (304, 309, 311)

Contributors
Thank you all for your contributions :)

cjlin1 donglihe-hub Gordon119 sian-chen Sinacam Eleven1Liu

What's Changed
Document
* New tutorials: [Handling Data with Many Labels](https://www.csie.ntu.edu.tw/~cjlin/libmultilabel/auto_examples/plot_linear_tree_tutorial.html), [Parameter Selection for Neural Networks](https://www.csie.ntu.edu.tw/~cjlin/libmultilabel/tutorials/Parameter_Selection_for_Neural_Networks.html)

Highlights
* Add nDCG to Linear Metrics (296)
* API: Save predict labels by `linear.get_positive_labels` (286)

Contributors
Thank you all for your contributions :)

cjlin1 will945945945 donglihe-hub Gordon119 Tonmoregulus Sinacam Eleven1Liu

New Contributors
Welcome donglihe-hub 🧞 Tonmoregulus 🎉