chore(deps): use github.com/aperturerobotics/jacobsa-crypto

[piggynl]

Replace unmaintained dependency github.com/jacobsa/crypto/siv with github.com/aperturerobotics/jacobsa-crypto/siv, maintained by @paralin and I. go build looks fine for linux/amd64 and linux/riscv64 after this change.

This will close #147.