flav-io/flavio: v2.4.0

New observables A large number of observables (decay widths and angular observables) of the decay Λb→Λ(1520)ll has been added, including two different form factor implementations (thanks to @Felicia56) Measurements The LHCb B->ee 2020 measurement has been implemented using the Gaussian uncertainties provided in the LHCb paper instead of upper bounds, which allows it to be used in a FastLikelihood (thanks to @alekssmolkovic) Bug fixes In the computation of epsilon_K, an issue with the renormalization scales of quark masses has been resolved (thanks to @MJKirk) An issue with labels in contour plots when using a matplotlib version >= 3.5.0 has been fixed (thanks to @MJKirk) The complex phase in the CKM dependence of the K→πνν amplitude has been fixed Deprications in numpy that expired in numpy 1.23 and 1.24 have been fixe