v2023.5.0

Feature

• Add covariance estimator (4b5d5d4)
• Allow passing dict of covariances in accuracy functions (3f2452d)

Documentation

• Remove unused imports in example notebook (d415101)
• Update example notebook (cd71b0f)
• Correct typo (e711966)
• Update notebook (f9a72a9)
• Update README and notebook example (cc53ae3)
• Update crypto statistical risk model notebook (c66f934)