v2.2.0

This release adds the following enhancements and bug fixes:

• paperai for beginners (#60)
• Add example notebook (#63)
• Modify default index configuration (#64)
• Shell doesn't accept command line parameters when run as a console script (#65)
• Match report section query with embeddings index query (#66)
• Fix issue with passing empty queue to Extractor pipeline (#67)
• Update minimum Python version to 3.8 (#71)
• Upgrade to txtai 6.0 (#70)