Add Wall of Browser Bugs entries for Selectors Level 4 :nth-child() (#20143)
Refs http://caniuse.com/#feat=css-nth-child-of
Refs https://drafts.csswg.org/selectors-4/#the-nth-child-pseudo
Refs https://crbug.com/304163
Refs https://bugzil.la/854148
[skip sauce]
origin: >
Bootstrap#19670
+-
+ browser: >
+ Firefox
+ summary: >
+ Implement the `of <selector-list>` clause of the `:nth-child()` pseudo-class
+ upstream_bug: >
+ Mozilla#854148
+ origin: >
+ Bootstrap#20143
+
-
browser: >
Firefox (Windows)
origin: >
Bootstrap#12832
+-
+ browser: >
+ Chrome
+ summary: >
+ Implement the `of <selector-list>` clause of the `:nth-child()` pseudo-class
+ upstream_bug: >
+ Chromium#304163
+ origin: >
+ Bootstrap#20143
+
-
browser: >
Chrome (Windows & Linux)