Pyxirr

- Solve XIRR analytically for 2 amounts
- Solve IRR analytically for 2-3 amounts

- XIRR Performance improvements
- Fixed building from source distribution
- Build wheels for Pyodide (WASM wheels)

- (X)IRR Performance improvements

- XIRR improvements ([49](https://github.com/Anexen/pyxirr/pull/49))
- Handle NAN in utility functions for multi-root analysis

- Private Equity functions ([42](https://github.com/Anexen/pyxirr/issues/42))
- XNPV/NPV functions now accept rate as multidimensional array
- Explain Multiple IRR problem + provide utility functions for analysis
- XIRR improvements (prevent from values < -1, grid search + brentq as fallback)

- IRR improvements ([47](https://github.com/Anexen/pyxirr/pull/47))
- Python 3.12 support