[Improvement] Remove tail comma for php function declarations

[camilledejoye]

Hi,

This improvement aims to handle trailing comma with functions and methods in PHP. Since PHP 7.3 trailing comma in function calls is a valid syntax. But until PHP 8 tailing comma in function declarations will still be invalid.

Argwrap already allows us to add the trailing comma with either argwrap_trailing_comma = 1 or argwrap_trailing_comma_braces = '('options. This PR adds a new option argwrap_php_remove_tail_comma_function_declaration, disabled by default, which activates a new hook that will remove the trailing comma only for function or method declarations.

The hook also handle arrow functions that were introduced in PHP 7.4.

[camilledejoye]

Hi,

I completely forgot about that ! Anyway it could be merged ?