Replace scryptb by native scrypt of Node 10+
node-scrypt indicates it is now obsolete and that we should prefer use Node crypto API directly which proposes scrypt feature.
Upgrade finished, please report issues to https://forum.duniter.org/t/interventions-et-indisponibilite-des-forums-et-de-gitlab/7131/220
Gitlab will be upgraded to latest version. Please refer to https://forum.duniter.org/t/interventions-et-indisponibilite-des-forums-et-de-gitlab/7131/220?u=immae for related discussions
node-scrypt indicates it is now obsolete and that we should prefer use Node crypto API directly which proposes scrypt feature.