Release v4.4.0 (#29735)

dist/css/bootstrap-reboot.css

@@ -1,5 +1,5 @@
 /*!
- * Bootstrap Reboot v4.3.1 (https://getbootstrap.com/)
+ * Bootstrap Reboot v4.4.0 (https://getbootstrap.com/)
  * Copyright 2011-2019 The Bootstrap Authors
  * Copyright 2011-2019 Twitter, Inc.
  * Licensed under MIT (https://github.com/twbs/bootstrap/blob/master/LICENSE)
@@ -33,7 +33,7 @@ body {
   background-color: #fff;
 }
 
-[tabindex="-1"]:focus {
+[tabindex="-1"]:focus:not(:focus-visible) {
   outline: 0 !important;
 }
 
@@ -133,20 +133,16 @@ a:hover {
   text-decoration: underline;
 }
 
-a:not([href]):not([tabindex]) {
+a:not([href]) {
   color: inherit;
   text-decoration: none;
 }
 
-a:not([href]):not([tabindex]):hover, a:not([href]):not([tabindex]):focus {
+a:not([href]):hover {
   color: inherit;
   text-decoration: none;
 }
 
-a:not([href]):not([tabindex]):focus {
-  outline: 0;
-}
-
 pre,
 code,
 kbd,