update account_fr to PCG 2019 (442 branch accounts)
The PCG (Plan Comptable Général) 2019 includes few new accounts in 442
(see http://www.anc.gouv.fr/cms/news/pcg-2019-1 as original source)
The purpose of the update of account_fr is to include the account 4421 which is a requirement for recording wage slip of employee since january 2019.
And while looking to add it, I saw other accounts under 442. So I updated the whole 442 branch.