Merging Nathan's async changes

[glromeo]

No description provided.

[NathanBeddoeWebDev]

Thanks. I've removed the naming changes, and confirmed with benchmark that the performance boost is still there. I'll have to check what I did in my fork branch to cook it that bad.

[glromeo]

the init compiler was in the render

[glromeo]

now I am going to fix the tests and release another version

[glromeo]

@NathanBeddoeWebDev

the compiler needs to be disposed at the end...that's why the tests where hanging

[glromeo]

@NathanBeddoeWebDev I am sorry that by making the PR myself you don't show up amongst the contributors
if you want just create a PR for something silly like removing that semicolon at line 78
or I think I saw an unused import somewhere ...I will be glad to merge it 😆

[NathanBeddoeWebDev]

Haha, all good. I'm not a massive open sourcer so I don't really mind. Sass performance has just been something of a quest for me at work for the past year.