Add "exit" to closers for "case" and "default"

"exit" also can be closer for "case" and "default"

Author: ksimka

CodeSniffer/Tokenizers/PHP.php

@@ -183,6 +183,7 @@ class PHP_CodeSniffer_Tokenizers_PHP
                                                              T_RETURN,
                                                              T_CONTINUE,
                                                              T_THROW,
+                                                             T_EXIT,
                                                             ),
                                                 'strict' => true,
                                                 'shared' => true,
@@ -199,6 +200,7 @@ class PHP_CodeSniffer_Tokenizers_PHP
                                                              T_RETURN,
                                                              T_CONTINUE,
                                                              T_THROW,
+                                                             T_EXIT,
                                                             ),
                                                 'strict' => true,
                                                 'shared' => true,