contributor-v0.16.0

Contributor CLI binaries.

The macOS binaries are signed with Iqlusion Inc's Developer ID and
notarized by Apple; the Windows binaries are Authenticode-signed and
timestamped. Verify any download against the published .sha256
beside it -- that checks integrity, while the signature is what
establishes who built it.

The Linux binary is not signed. Verify it against the published
checksum.

Nothing leaves your machine until you run submit. Run
submit --dry-run first to see exactly what would be sent.