Improve box model analysis

[yume-chan]

I always have css.lint.boxModel on, but what I usually want to do is to override properties from other css files.

.element {
    width: 60px;
    padding: 0 !important;
}

The problem is, VS Code keeps warning me about this: Do not use width or height when using padding or border.

Does padding: 0 really counts as using?

So instead of turn this feature off, I'd love to make it be aware of what I'm doing.

[KamasamaK]

Alternatively, add es2016.array.include to compilerOptions.lib in the tsconfig.

[yume-chan]

I can't find any statement about engine requirement (which version of node or browser it will run on), so I didn't modify lib config.

[aeschli]

Thanks @KamasamaK, I reviewed the changes, but renamed the new file to be also used by future lint rules.