Update to 13.0.4 and fix database charset

[mastereur]

Problem

• Database gap due to specific charset used by Dolibarr

Solution

• Change charset on installation and on upgrade.
• /!\ For upgrade, database gap is still present, Reinstallation is needed.

PR Status

• [x] Code finished and ready to be reviewed/tested
• [x] The fix/enhancement were manually tested (if applicable)

Automatic tests

Automatic tests can be triggered on https://ci-apps-dev.yunohost.org/ after creating the PR, by commenting "!testme", "!gogogadgetoci" or "By the power of systemd, I invoke The Great App CI to test this Pull Request!". (N.B. : for this to work you need to be a member of the Yunohost-Apps organization)

[mastereur]

!testme

[yunohost-bot]

Alrighty!