Created by: zalog
This PR adds a new vars for $nav-link-*
's:
$nav-link-font-size: null !default;
$nav-link-font-style: null !default;
$nav-link-font-weight: null !default;
$nav-link-color: $primary !default;
$nav-link-hover-color: darken($primary, 15%) !default;
This PR depends on https://github.com/twbs/bootstrap/pull/30622