Version 13.0 contains a new version (V5) of the protocol environment, which is the set of functions that protocols can call. This new version is used by protocol Jakarta, which is a proposal for the successor of Ithaca. This release also contains Jakarta itself as well as its daemons.
To update from sources:
git fetch git checkout v13.0 rm -rf _opam _build make build-deps eval $(opam env) make
If you are using Docker instead, use the
v13.0 Docker images of Tezos.