Support for decimal.Decimal and other numerical types as an alternative to float

[ezekielnewren]

I'd like there be an option like parser = BaseArithmeticParser(numerical_types=[int, Decimal, complex]) where if numerical_types=None it would default to the value numerical_types=[int, float, complex] so that when I'm dealing with monetary values I can be confident that the answer IS EXACT, not really super close.

[ptmcg]

Interesting idea, I'll look into it.