1.24.0

• add source Guildford Borough Council, UK (thanks @brewston)
• add support for dedicated calendars per waste type (thanks @ejjoman)
• add source Melton City Council, Melbourne (thanks @ankycooper)
• add source for Republic Services, USA (thanks @DeadEnded)
• add source Wiltshire Council, UK (thanks @rust84)
• add source for static schedules (thanks @ejjoman)
• fix upcoming events in calendar (thanks @ejjoman)
• fix blocking call in source warszawa19115_pl (thanks @bertmelis)
• add source Canterbury City Council, UK (thanks @sultanhq)
• add source SSAM.se (thanks @vasaru)
• add source West Berkshire Council, UK (thanks @hdurdle)