Add multiline_whitespace_before_semicolons (#2)

With this change we will remove any whitespaces before a semicolon
e.g.
- return 1 + 2
-     ;
+ return 1 + 2;

https://github.com/PHP-CS-Fixer/PHP-CS-Fixer/blob/master/doc/rules/semicolon/multiline_whitespace_before_semicolons.rst

Author: OrestisZag

src/RuleSet/TicketSwapRuleSet.php

@@ -132,6 +132,7 @@ public static function create() : RuleSet
                     'on_multiline' => 'ensure_fully_multiline',
                     'attribute_placement' => 'standalone',
                 ],
+                'multiline_whitespace_before_semicolons' => true,
                 'native_function_casing' => true,
                 'native_type_declaration_casing' => true,
                 'new_expression_parentheses' => true,