v0.20.0

Major changes and bug fixes

• implementation of "Truncated proposals for scalable and hassle-free sbi" (#754)
• sample-based expected coverage tests (#754)
• permutation invariant embedding to allow iid data in SNPE (thanks @coschroeder, #751)
• convolutional neural network embedding (thanks @coschroeder, #745, #751, #769)
• disallow invalid simulations when using SNLE, SNRE, or atomic SNPE-C (#768)

Enhancements

• add tutorial on all available methods (#754)
• allow seeding of simulate_for_sbi on multiple workers (#762)
• expose enable_transforms in sampler interface (#756)
• bugfix for building the transformation of transformed distributions (#756)