That's just stupid, if more people ask for it, you should make it quicker.
are YOU gonna make it? upgrading versions takes a SERIOUSLY long time, and a LOT of work. Also take into account that this is work done with no profit, and for people like you have next to no respect for the team doing it. TBH, you're just making yourself out to be a jerk at this point.
i see peopel asking for an update to 1.10 if they update the mod at all as it takes a lot of work i dont think they will make it for every single version its more likly they will make it for 1.12 and skip the others or 1.13 or all the way up to 1.15 it depends on how far along they are and what version of the game is out at the time with modding support it would be far easyer to skip all the versions and just make it for one version the most recent current update that supports mods currently is more likly for 1.12 1.13 dosnet yet have mod support as forge is still being rewritten it is more likly they will update it for 1.13 insted of 1.12 becuase 1.13 is a compleate rewirte from 1.12 for example 1.13 no longer uses item ids this is why its takeing longer for mods to come out they have to redo them to use names insted of numbers as IDS.. chances are this mod will not come out for anything lower then 1.13 once 1.13 supports mods due to the fact it would be pointless to relase it for 1.12 and than compleaty rewirte it agian for 1.13 after that it will probbaly be easyer to update mods their will be no issues with id conflicts anymore and makes adding items that much easyer