Yfinance-cache

Mostly price improvements. Main changes:
- fix propagating new dividends and splits to cached prices. You probably want to [verify prices](https://github.com/ValueRaider/yfinance-cache#verifying-cache) after updating
- add FX & Crypto support
- various fixes and API tidy

Full changelog in 60

Then [some tweaks to Financials update logic](https://github.com/ValueRaider/yfinance-cache/commit/7a5bfe7ffdfd9f14f24eca692e7df181effb168a).

Fix `Ticker.info` caching 56

Fix for `Ticker.get_release_dates()` 55

Big release here - implement cache auto-update for financials. The key part is new function `Ticker.get_release_dates()`.

Implement merging new financials into cache b7288bef50dd5b090ac061c83901d891c1b39d7c

Big release here - implement cache auto-update for financials. The key part is new function `Ticker.get_release_dates()`.