Move esbuild to the NPM @esbuild scope

[cw789]

This is my take on #52.
It's not ready until the new breaking version number of esbuild is known for sure.

Update: Ready now → esbuild v0.16.0

[josevalim]

Looks great! A couple notes:

1. Let's bump the esbuild version once the release is out
2. Let's update the manual install instructions in Esbuild moduledoc :)

[cw789]

1. Totally agree - will do
2. Good point - will do

Found one more issue with my solution.
target() is used in bin_path() → https://github.com/phoenixframework/esbuild/blob/main/lib/esbuild.ex#L128
Means nearly everyone needs to reinstall via mix esbuild.install...

I could additionally do a Version.compare/2 in bin_path() or one in target() and move legacy targets to the target() function.

[josevalim]

Means nearly everyone needs to reinstall via mix esbuild.install...

Well, they will have to reinstall once they change the version or update this package with a new version, so that's ok. :)

[cw789]

Right, sounds good. Thank you.

[chrismccord]

❤️❤️❤️🐥🔥