Fix #678 - Improve Yandex detection

src/ua-parser.js

@@ -319,7 +319,7 @@
             ], [VERSION, [NAME, 'Konqueror']], [
             /trident.+rv[: ]([\w\.]{1,9})\b.+like gecko/i                       // IE11
             ], [VERSION, [NAME, 'IE']], [
-            /yabrowser\/([\w\.]+)/i                                             // Yandex
+            /ya(?:search)?browser\/([\w\.]+)/i                                  // Yandex
             ], [VERSION, [NAME, 'Yandex']], [
             /(avast|avg)\/([\w\.]+)/i                                           // Avast/AVG Secure Browser
             ], [[NAME, /(.+)/, '$1 Secure '+SUFFIX_BROWSER], VERSION], [