Prebuild binaries

[bendemboski]

Use prebuild and prebuild-install to enable consumption of prebuilt binaries. This is basically a copy of how node-keytar does it

[rsese]

Thanks for the contribution! Chatted with the other maintainers and while we do see that prebuilt binaries could be generally useful for other applications that use node-spellchecker, it doesn't look like something necessary for Atom in particular (let me know if I'm misunderstanding though). With our current resources and priorities, as much as possible we're not taking on changes that don't directly address some issue/bug in Atom. node-keytar is a bit different right now because it has someone keeping an eye on it consistently.

If things change in the future we could revisit this but for now, because we treat our issues list as the Atom team's backlog, we'll close this out since it's not something the team would work on. But thank you again for the contribution, we do appreciate it.