remove dependency of pyxirr

[yellowbean]

Context :

• it has dependency on rust.
• XIRR for non-periodic cash flows? numpy/numpy-financial#29, folks at numpy - financial seems not having interset to include xirr

Solution:

Using

• https://github.com/sprksh/finance-calculator
• https://finance-calculator.readthedocs.io/en/latest/usage.html

[yellowbean]

[project]
dynamic = ["version"]

[project]
keywords = ["cashflow", "abs", "mbs", "cashflow model", "rmbs" ,"CLO", "cashflow engine"]

[yellowbean]

a8b47fb