Abel Fernández

Implemented in #218

Improved the multisig creation in #213 and the multisig error handling in #214

@laloquidity added support in #216.

It looks like CosmJS does not yet support signing those with ledgers https://github.com/cosmos/cosmjs/blob/main/packages/stargate/src/modules/authz/aminomessages.ts

Not yet solved, but added to #99

Implementation not valid, will keep exploring in #29