Update to `numpyro 0.0.14` (lot's of new functionality).

[flo-schu]

• [ ] implement AIES and ESS methods, which work with gradient free approaches. (Could be a lot faster with my model).
• [ ] Can the ßmethod be parallelized? It shares information between chains, but the proposals are computed independently, so I can imagine that parallelization is possible (although there may be numpyro specific constraints.)