UpsidePotential

Results 2 issues of UpsidePotential

**Describe the bug** .toLocaleParts returns a date offby 1 if used on a date prior to 1884-01-01. formatToParts works correctly. **To Reproduce** ``` const { DateTime } = require("luxon") const...

Since VXX follows the VX30 index, I would expect he holdings to be close to the calculated VX30 weightings. ![image](https://github.com/dougransom/vix_utils/assets/48447427/85c7e0b9-7ef9-4b87-b7bf-b840b20cc3f3) ![image](https://github.com/dougransom/vix_utils/assets/48447427/6bc8fedc-0a5d-4366-9175-7f7fa773a75d)