Merge branch 'refactor-drop-node-sass-support' of https://github.com/coreui/coreui into refactor-drop-node-sass-support

# Conflicts:
#	package-lock.json
#	scss/_forms.scss
#	scss/_functions.scss
#	scss/_mixins.scss
#	scss/_variables.scss
#	scss/coreui.scss
#	scss/mixins/_alert.scss
#	scss/mixins/_banner.scss
#	scss/mixins/_color-mode.scss
#	scss/mixins/_list-group.scss
#	scss/themes/bootstrap/bootstrap.rtl.scss
#	scss/themes/bootstrap/bootstrap.scss

Author: mrholek

.eslintignore

@@ -11,8 +11,7 @@ export default context => {
       autoprefixer: {
         cascade: false
       },
-      'postcss-combine-duplicated-selectors': {},
-      rtlcss: context.env === 'RTL'
+      'postcss-combine-duplicated-selectors': {}
     }
   }
 }