v2.4.0

Features

• is_schedule_available fn (André)
• school_year: trimester utility functions (André)
• notifier: notify new schedule (André)
• file_io: schedule data path builder (André)
• fetch next schedule script (André)
• add fetch next schedule script to cron job (André)

Bug Fixes

• dockerfile: add missing filename extension (André)

Code Refactoring

• gaps_notifer: simplify function name (André)
• notifier/email: separate logic from notification type (André)
• notifier: rename notify function (André)