Create a standalone exe version of elm-review

[MartinSStewart]

elm-review is cool (very cool!), but sometimes I don't use it because I don't want to deal with NPM and Node.

There seems to be support for converting an NPM package into a stand-alone executable without any outside dependencies (so no need for the user to install Node for example) https://nodejs.org/api/single-executable-applications.html

Ideally then part of elm-review's CI would be to generate an exe version for Mac, Linux, and Windows that people can download and run from their CLI.

[jfmengels]

This sounds good to me. If someone wants to take a look, that would be awesome.

Ideally, this would be as low-maintenance as possible, and automated in CI, though that could be done in later steps if needed.