Deprecated callable reference to self in PHP 8.2

[mkilmanas]

In PHP 8.2 some formats of callables were deprecated - one of those formats is ['self', 'myMethod'] which is exactly what is used here:

event-store-symfony-bundle/src/Projection/Options/ProjectionOptionsFactory.php

Lines 21 to 26 in 34204bb

	public static function createProjectionOptions(array $config): ProjectionOptions
	{
	\array_walk($config, ['self', 'mapOptions']);
	return new ProjectionOptions($config);
	}

This raises a deprecation warning when running this code on PHP 8.2:

Deprecated: Use of "self" in callables is deprecated

[unixslayer]

@mkilmanas solved in #94