Deprecated selector in `one-dark-vivid-syntax/index.less`

[febLey]

In one-dark-vivid-syntax/index.less:

Starting from Atom v1.13.0, the contents of atom-text-editor elements are no longer encapsulated within a shadow DOM boundary. This means you should stop using :host and ::shadow pseudo-selectors, and prepend all your syntax selectors with syntax--. To prevent breakage with existing style sheets, Atom will automatically upgrade the following selectors:

• atom-text-editor [class="highlight highlight-selected background"] .region.region.region, atom-text-editor .highlight-selected.background .region.region => atom-text-editor [class="highlight highlight-selected background"] .region.region.region, atom-text-editor .highlight-selected.syntax--background .region.region

Automatic translation of selectors will be removed in a few release cycles to minimize startup time. Please, make sure to upgrade the above selectors as soon as possible.

[febLey]

Ah already seeing that there's a TODO comment in styles/editor.less line 109.