Fix linux build

[gorazdko]

Abstract

Close #20

Currently there are only instructions for how to install packages on Ubuntu.

Status

Note in this particular case this PR can be seen as superceeded by #29

wait for dependencies to get reviewed and merged first:

• https://github.com/BlockchainCommons/bc-slip39/pull/24
• https://github.com/BlockchainCommons/bc-shamir/pull/27
• https://github.com/BlockchainCommons/bc-bip39/pull/20
• https://github.com/BlockchainCommons/bc-ur/pull/1