fixed slug method for slovak specific characters

the slugs were not generated properly for slovak words (leaving some characters untranslated)
added missing slovak-specific special characters into $char_map

Author: igor-kamil

src/Conner/Tagging/TaggingUtil.php

@@ -106,6 +106,10 @@ public static function slug($str) {
 			'č' => 'c', 'ď' => 'd', 'ě' => 'e', 'ň' => 'n', 'ř' => 'r', 'š' => 's', 'ť' => 't', 'ů' => 'u',
 			'ž' => 'z',
 
+			// Slovak
+			'Ľ' => 'L', 'Ĺ' => 'L', 'Ô' => 'O', 'Ŕ' => 'R',
+			'ľ' => 'l', 'ĺ' => 'l', 'ô' => 'o', 'ŕ' => 'r',
+			 
 			// Polish
 			'Ą' => 'A', 'Ć' => 'C', 'Ę' => 'e', 'Ł' => 'L', 'Ń' => 'N', 'Ó' => 'o', 'Ś' => 'S', 'Ź' => 'Z',
 			'Ż' => 'Z',