GitLab

* swap go-ipld-prime-proto for go-codec-dagpb

DO NOT MERGE

* feat(graphsync): update for linksystem

replace most instances of loader and storer with ipld.LinkSystem

* feat(graphsync): use trusted storage

* feat(deps): update to released ipld-prime

* ci(circle): use updated orb

* style(lint): fix lint errors
Co-authored-by: Daniel Martí <mvdan@mvdan.cc>