v1.0.0

This release is the first version that supports the discord.py v2.0 library.

User facing changes:

• All commands now use the slash command framework.
• Global schedule settings are now able to be set per guild.
• Time channel can now be created.
• Self-cleaning open and close messages.
• User commands of check schedule and current time.

Backend and bot maintenance 'features' have been improved which include:

• Use of alembic to manage database migrations.
• Use of aoisqlite to async database calls.
• Various channel checks upon deletion or guild removals to keep database tidy.
• Moved the any raid filter to a separate cog.
• Permissions checking and warnings for schedules.
• Fixes for TimeChannel permissions.
• Do not allow open and close times to be the same.
• Changed open and close messages to embeds.
• Code tidy and imports tidy.
• poetry used for dependencies.