v0.0.4

Added

• Add --mode=snp:ovmf-hash and --snp-ovmf-hash to allow precalculating the first part of SNP launch digest and avoid carrying the full OVMF binary for every minor OVMF change (by @agraf).
• Add new utility snp-create-id-block which allows generating an SNP ID block from a given measurement (by @shuk777).