Graham v4.0.2

• Fix rain algorithm
• Fix erroneous deposit notifications
• Tweak node configuration
• Numerous other fixes

Graham v4.0.1

• Fix ordering of stats commands for postgres (SQLite still doesn't order correctly due to tortoise/tortoise-orm#256)
• Add !legacyboard which is all-time top tippers
• Make !ballers reset every year
• Use rapidjson
• Misc bug fixes

Graham v4.0.0

Graham has been re-written completely from the ground up.

• Database schema has been completely re-done
• More modular design with cogs
• Switch to tortoise-orm from peewee, to get an asyncio-compatible ORM
• Single process for bot and transactions
• Entirely new configuration paradigm
• aioredis, for an asyncio-friendly redis implementation
• NANO tip units are in NANO now, not naneroo (1 naneroo == 0.000001 NANO)

Generally the code base is significantly cleaner, the bot is more efficient, easier to setup, and more reliable.