Pypme

**Full Changelog**: https://github.com/ymyke/pypme/compare/v0.6.0...v0.6.1

**Full Changelog**: https://github.com/ymyke/pypme/compare/v0.5.2...v0.6.0

Now requires tessa >= v0.5.0 in order to benefit from all kinds of fixes and performance improvements

- Replace investpy with tessa. (Note that tessa now uses yfinance instead of investpy.)

- Add networked test for `investpy_xpme`.
- Rename investpy functions to `investpy_xpme` and `investpy_verbose_xpme`.
- Add and expose helper function `pick_prices_from_dataframe`.
- Recategorize from library to package.
- Simplify some code.