distributedOmit with prop tests. did not work for pick so skipping

[tommysullivan]

fixes #421

u may like to organize this differently and i didnt look into why distributedOmit didnt work for pick, but as i dont use that and really want to use your library but need it to preserve unions for prop() (which returns Omit that breaks unions see #421 ), i built a fix and a type test for it

i looked at effect ts and monocle and had different issues with each, yours seems the most ergonomic and i like the standalone api since i can compose things together independently of the parent types allowing me to avoid repetitive optics

but i need it to work with my unions or i cant use it. about to try incorporating this fork into my app and see how that goes and if i run into any other challenges

really hoping to find a reliable and simple optics capability for typescript

thanks for all the work u put into this

[tommysullivan]

hm although this fixed some cases for me, i still cant use the library, the .at(n) for an array of T where T is a discriminated union breaks in both the standalone and regular apis, even if i perform the identity during the modification.

will give up and use immer for now, appreciate it nonetheless