v5.9.0

Commits

• 07abe3f: Update third-party libraries (Nicolas Perrenoud)
• cbb687b: Fix optionally setting locale in user API (Nicolas Perrenoud)
• 0621cb0: Use vue-based main application layout (Nicolas Perrenoud) #38
• dfb91e5: Remove unused CSS/JS components input-list-add-button, input-list-delete-button, import-form-file (Nicolas Perrenoud) #38
• 96b2848: Remove custom snackbar CSS (Nicolas Perrenoud) #38
• 61e397e: Remove unused lib bs-custom-file-input (Nicolas Perrenoud) #38
• 7c0a7de: Update changelog (Nicolas Perrenoud)