(fix): Adds Prettier based on RFC 0628

[abhilashlr]

Fixes #13

• Adds Prettier based on 💅 Add Prettier 💇 emberjs/rfcs#628
• Fixes all the lint errors ran based on npm run lint (JS, and HBS)
• Fixes all the breaking test cases as well based on npm run test

[abhilashlr]

@kennethlarsen Please have a look at this too, when you get time :). This PR adds Prettier Linter rules based on Robert's RFC 628.

[rwjblue]

I don't fully grok this change, we already have 1.1 listed just above. I think this should still be 1.10.

[abhilashlr]

That was a prettier's --fix change 😮 . My bad, didn't realise that we already had a 1.1 and trusted prettier to go ahead with this fix. I will have it corrected. Now I believe, these should be strings in that case. Thoughts?

[abhilashlr]

That brings up another bug in the implementation that - whichever option we choose between 1.1 or 1.10 (displayed as 1.1) from the version dropdown, there is only 1.1 displayed in the dropdown and the changes corresponding to "from" and "to" versions shows only 1.10's changes. Moving it to a string might solve this problem, although that looks like a fairly bigger change. How do we go about implementing this @rwjblue, could you please help?

[rwjblue]

Now I believe, these should be strings in that case

Yeah, probably should be strings.

[rwjblue]

Seems like that is a preexisting issue, can you make an issue to fix it?

[abhilashlr]

Yeah sure I’ll work on it and move them to strings. Thanks 👍🏻

[kennethlarsen]

Thanks @abhilashlr and thanks @rwjblue for the review ✨