v4.2.0

What's Changed

• Multidim pca fix by @keeminlee in #48
• Multicam jax implementation -- partial backend unification by @keeminlee in #49
• add cli args to integration tests + cleanup by @themattinthehatt in #51
• Iblpupil jax backend by @keeminlee in #52
• Ibl paw jax backend + auto smoothing updates! by @keeminlee in #53
• Removed old functions, as well as R (observation noise cov matrix), a redundant param calculated from ensemble variance per timestep by @keeminlee in #54

Full Changelog: v4.1.0...v4.2.0