fix(deps): replace unmaintained rust-crypto with sha2, bump vulnerabl…#208

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EddieHouston:fix/cargo-audit-vulnerabilities

Commits on Apr 16, 2026

fix(deps): replace unmaintained rust-crypto with sha2, bump vulnerable dependencies
EddieHouston
committed
test(sha256): add NIST test vectors and P2PKH script hash test
EddieHouston
committed