Build/Test Tools: Update the caniuse browser data and regenerate CSS.

This includes three minor updates to generated CSS files:

- A single `-webkit-` prefix is removed for `min-width`, which was required for Safari <= 10.1 (0.06% total global usage). WordPress only supports the last two versions.
- 2 instances where the `-o-` prefix are added for `tab-size`. This appears to be for Opera Mobile, which has creeped back over the 1% global usage.

Props peterwilsoncc, jorbin.
Fixes #53686.
Built from https://develop.svn.wordpress.org/trunk@51456


git-svn-id: http://core.svn.wordpress.org/trunk@51067 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/css/admin-bar.css

@@ -988,7 +988,6 @@ html:lang(he-il) .rtl #wpadminbar * {
 	/* Override default min-width so dropdown lists aren't stretched
 		to 100% viewport width at responsive sizes. */
 	#wpadminbar .ab-top-menu > .menupop > .ab-sub-wrapper {
-		min-width: -webkit-fit-content;
 		min-width: -moz-fit-content;
 		min-width: fit-content;
 	}