Request for dividend paying equity adjustments

[MorningCoffeeZombie]

The BSM formula offered in this pip is the standard BSM model. Could you please add support for equities that pay regular dividends where the input 'q' represents the yield?

Example:

import opstrat as op

K = 425			# Strike
r = 1.978		# Risk free rate
t = 35			# Time to expiry (in days)
sigma = 28.84		# Annualized volatility
St = 425.48		# Underlying price
type = 'p'		# Option type (c or p)

bsm=op.black_scholes(K=K, St=St, r=r, t=t, v=sigma, type=type)

q = 3.2			# Dividend
bsm_div=op.black_scholes(K=K, St=St, r=r, t=t, v=sigma, type=type, q=q)