Retroactively sign off Javi's commits

[yshyn-iohk]

Proposed feature

@elribonazo, the commit with the following text should be added to the repo

I, Javier Ribó, retroactively sign off on these commits:
commit 9ecdbdd fix: upgrade elliptic dependency (#191)
commit d1ee804 fix: update usage of the bip32ed25519 wrapper. (#174)


Signed-off-by: Javier Ribó <elribonazo@gmail.com>