Finmarketpy

* Set FinancePy version to 0.193

* Fixed YoY bug

* Improved plotting in particular for plot start/finish dates

* Added total returns indices for FX spot, FX forwards and FX options, with examples
* Added calendars and expiry calculations for FX spot, FX forwards and FX options

* Fixed startup issue with newer MacOS
* Fixed GBP depo references

* Fixed EventStudy ref to findatapy
* Tidied examples