3.2.4

• Upgrade passport to 0.7.0 (fixes https://github.com/biblibre/urungi/security/dependabot/36)
• Upgrade multer to 1.4.5-lts1 (fixes https://github.com/biblibre/urungi/security/dependabot/28)
• Switch from unmaintained js-xlsx to xlsx (fixes https://github.com/biblibre/urungi/security/dependabot/42 and https://github.com/biblibre/urungi/security/dependabot/57)