Tests: take Safari 9.1 into account

Safari 9.1 shares its support test results with Safari 9.0 but it's been
excluded from the regex catching Safari 9.0. This has been fixed.

(cherry-picked from 234a2d8)

Author: mgol

test/unit/support.js

@@ -150,7 +150,7 @@ testIframeWithCallback(
 			"reliableMarginLeft": true,
 			"reliableMarginRight": true
 		};
-	} else if ( /9\.0(\.\d+|) safari/i.test( userAgent ) ) {
+	} else if ( /9(\.\d+|) safari/i.test( userAgent ) ) {
 		expected = {
 			"ajax": true,
 			"boxSizingReliable": true,