NatLibFi/Annif: Annif 0.46

This release includes improvements in training by reducing memory usage and adds the --cached option to train command to reuse the already preprocessed data from the previous run. Vocabulary management is improved by allowing to update the labels in an already existing vocabulary (renaming labels and removing subjects) without the need to retrain the project. Support of notation codes used in classifications (e.g. UDC or YKL) is added.

New features:

• #342/#376 --cached option to reuse preprocessed training data
• #274/#383 Retain subject IDs when loading vocabulary over existing one
• #157/#385 Support for notation codes

Improvements:

• #363/#381 Use LMDB to store vectors in nn_ensemble
• #379 Use sparse vectors in PAV backend
• #382 Fix sonarqube errors (code quality problems)

Bug fixes:

• #386 Fix invalid "fasttext" package being installed
• #384 Remove duplicated be param option in optimize CLI