PHPCS 4.x | FunctionDeclarations::getParameters(): document T_USE han…

…dling

`T_USE` tokens used for closure use statements are parentheses owners as of PHPCS 4.x.

The `FunctionDeclarations::getParameters()` method already handles this correctly cross-version.

This just adds documentation to confirm this has been looked at and no changes are needed for cross-version compatibility.

Refs:
* squizlabs/PHP_CodeSniffer 2593
* squizlabs/PHP_CodeSniffer@08824f3
* squizlabs/PHP_CodeSniffer 3104

PHPCSUtils/Utils/FunctionDeclarations.php

@@ -436,6 +436,7 @@ public static function getParameters(File $phpcsFile, $stackPtr)
         }
 
         if ($tokens[$stackPtr]['code'] === \T_USE) {
+            // This will work PHPCS 3.x/4.x cross-version without much overhead.
             $opener = $phpcsFile->findNext(Tokens::$emptyTokens, ($stackPtr + 1), null, true);
             if ($opener === false
                 || $tokens[$opener]['code'] !== \T_OPEN_PARENTHESIS