Add multiline_whitespace_before_semicolons rule

[samuelmaudo]

This PR recovers a rule to forbid multi-line whitespace before the closing semicolon.

With this rule, this code:

$object->method1()
    ->method2()
    ->method(3)
    ;

becomes:

$object->method1()
    ->method2()
    ->method(3);

It was included in the PHP CS Fixer ruleset with the opposite configuration:

$object->method1()
    ->method2()
    ->method(3)
;

However, I believe that moving the semicolon to the new line for chained calls is not commong within the PHP community.