Merge branch 'dev' of https://github.com/matter-labs/bellman into dev

migrate to new pairing

Merge pull request matter-labs#10 from matter-labs/optimizations

Optimization using prefetch, available for nightly Rust and feature

prepare for publishing

Merge pull request matter-labs#7 from matter-labs/sonic

- Make singlethreaded version as feature to be used already - Introduce features to later add full SONIC and GM17

Auto merge of matter-labs#13 - ebfull:fix-comment, r=ebfull

Fix comment about sqrt.

Still just testing CI stuff.