Enforce trailing commas in match-cases

[krzysztofrewak]

Right now (even with changes from #30) match case blocks are not checked for trailing commas:

$result = match ($test) {
    1 => "a",
    2 => "b"
};

Expected behaviour would be:

$result = match ($test) {
    1 => "a",
    2 => "b",
};

As @Baakoma notices, TrailingCommaInMultilineFixer from PHP-CS-Fixer doesn't have option for these structures. One solution would be to create pull request do PHP-CS-Fixer; second - to clone current fixer and add it to our repository.

[krzysztofrewak]

Memo: This will be added to PHP-CS-Fixer with PHP-CS-Fixer/PHP-CS-Fixer#6376

[krzysztofrewak]

Merged to master here: PHP-CS-Fixer/PHP-CS-Fixer#6381

Now we are just waiting for a new release.