Added caching and tweaked the rates limit

Bug Fixes
balance was reset if sold >= paid (f0ed4f7)
investor data lost on disconnect (1c1d533)

2.1.2 (2022-08-17)
Bug Fixes

• allows admin commands to be used via console (4d83695)
• order of ranking was reversed (f31ff49)

Added debug message for API problems
Fixes decimal places in coin value (placeholder)
Updated currency list csv
Improved timezone handling
Improved async handling of update tasks
Loads investors data after a reload

Added PlaceholderAPI support
- %cryptomarket_investor_patrimony%
- %cryptomarket_price_<coin>%
- %cryptomarket_balance_<coin>%

Refactored the GUI code to improve performance

Adds support for 1.8-1.16

Fixed bug where CM was interfering with chests with custom titles

And changed how the plugin connects to the db