Convert to v2 addon

[SergeAstapov]

As this addon provides only run-time functionality hence it's the great candidate for v2 addon conversion.
There is guide great Porting an Addon to V2 guide I suggest we follow.

My thought process of the next steps is to have PRs in the following order:

1. convert to monorepo Convert to monorepo #13
2. convert addon to v2 Convert to v2 addon #14
3. prepare for ember-modifier v4 per migration guide Prepare for ember-modifier v4 #19
4. release new major v4.0.0

@lifeart do you have any thoughts, concerns? I can volunteer to work on those

[lifeart]

@SergeAstapov all my thumbs up for it!

[SergeAstapov]

@lifeart I think this addon is ready for v4.0.0 to go out

[lifeart]

@SergeAstapov thank you for your work, trying to release it from my PC

Manually published v4 https://www.npmjs.com/package/ember-click-outside-modifier, looks like we need to figure out better release process XD (or, likely, I'm missing smf)

[SergeAstapov]

@lifeart thank you for publishing!

@lifeart that error is weird indeed. I wonder if Node.js version had messed up things (just a random thought).
Also, wonder if missing GITHUB_AUTH env variable per Release Process was a culprit.

Anyway I've created #20 to track that issue separately so we can close this one out now!

[lifeart]

Looks like release-it for windows has incorrect binary configuration..