New version of Mordecai released

[ahalterman]

After a long delay, a new version of Mordecai is out: https://github.com/ahalterman/mordecai3

The new version is a complete rewrite from the ground up and has the following changes:

• uses spaCy v3, which improves the NER and allows us to use transformer-based embeddings, rather than static embeddings
• a much more accurate pytorch ranking model
• better documentation of the model architecture and performance, available here: https://arxiv.org/abs/2303.13675

I plan to stop development on this version of the library, and I'm looking forward to your feedback and bug reports on the new repo.