v0.2.0

1. A new metric, "loss_extended_std", has been introduced. This metric measures the slope of the loss tail of the payoff curve. It is beneficial for identifying combinations that present limited risk.

2. Added the calculation of futures into consideration. To incorporate future contracts into the combination loop, the parameter "includeFutures=True" should be added to the "option_model" method.

v0.1.4

reduce redundant code and calculation

v0.1.3

restructure code
remove unnecessary calculation
update example

v0.1.2

bump computation speed

v0.1.1

add support for whether to sell or buy the corresponding options.

v0.1.0

its ready to use, could be buggy though.
you are welcome to create an issue if you encounter any problem.