* Add `ng-deep` to the list recognized by the `PseudoElement` linter
* Add `classic_BEM` convention for `SelectorFormat`
* Deprecate `strict_BEM` convention for `SelectorFormat`.
  Use `classic_BEM` instead.
* Add `font-display` and `justify-items` properties to `PropertySpelling` linter
* Add `fr` unit to `PropertyUnits` linter