Add missing cstruct upper bound in ledgerwallet
The package is vendored but the upstream metadata on opam-repository have since then been updated.
Helps with moving to opam-monorepo, preventing it from selecting a newer incompatible version.
The package is vendored but the upstream metadata on opam-repository have since then been updated.
Helps with moving to opam-monorepo, preventing it from selecting a newer incompatible version.