NodeFactory: fixed 'private final' methods to 'private';

[giuspe]

I experienced a few annoying warnings while running wp-cli in a lando environment using PHP 8.0 (PHP 8.0.3 (cli) (built: Apr 10 2021 13:18:16) ( NTS )).

PHP Warning:  Private methods cannot be final as they are never overridden by other classes in /app/vendor/dallgoot/yaml/sources/NodeFactory.php on line 55

Warning: Private methods cannot be final as they are never overridden by other classes in /app/vendor/dallgoot/yaml/sources/NodeFactory.php on line 55
PHP Warning:  Private methods cannot be final as they are never overridden by other classes in /app/vendor/dallgoot/yaml/sources/NodeFactory.php on line 77

Warning: Private methods cannot be final as they are never overridden by other classes in /app/vendor/dallgoot/yaml/sources/NodeFactory.php on line 77
PHP Warning:  Private methods cannot be final as they are never overridden by other classes in /app/vendor/dallgoot/yaml/sources/NodeFactory.php on line 91

Warning: Private methods cannot be final as they are never overridden by other classes in /app/vendor/dallgoot/yaml/sources/NodeFactory.php on line 91
PHP Warning:  Private methods cannot be final as they are never overridden by other classes in /app/vendor/dallgoot/yaml/sources/NodeFactory.php on line 105

Warning: Private methods cannot be final as they are never overridden by other classes in /app/vendor/dallgoot/yaml/sources/NodeFactory.php on line 105
PHP Warning:  Private methods cannot be final as they are never overridden by other classes in /app/vendor/dallgoot/yaml/sources/NodeFactory.php on line 138

Warning: Private methods cannot be final as they are never overridden by other classes in /app/vendor/dallgoot/yaml/sources/NodeFactory.php on line 138
PHP Warning:  Private methods cannot be final as they are never overridden by other classes in /app/vendor/dallgoot/yaml/sources/NodeFactory.php on line 155

Warning: Private methods cannot be final as they are never overridden by other classes in /app/vendor/dallgoot/yaml/sources/NodeFactory.php on line 155
PHP Warning:  Private methods cannot be final as they are never overridden by other classes in /app/vendor/dallgoot/yaml/sources/NodeFactory.php on line 168

Warning: Private methods cannot be final as they are never overridden by other classes in /app/vendor/dallgoot/yaml/sources/NodeFactory.php on line 168

Simply changing private final to private of course solves the warnings.

[dallgoot]

Thank you for your work :)

[giuspe]

Thank you for your work :)

definitely thank you for you work :)