Problem

• When changing phpversion, we used to rely on ynh_remove_fpm_config helper to call ynh_remove_app_dependencies
• However, the behavior changed with packaging v2, ynh_remove_fpm_config as I understand does not call this helper anymore.
• Also the package did not reinstall the dependencies when changing the php version. For example, if we installed mysql, php{NEWVERSION}-mysql were not installed

Solution

• explicitly call ynh_remove_app_dependencies
• call ynh_install_app_dependencies with the dependencies

Resolves #131

PR Status

• Code finished and ready to be reviewed/tested
• 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)