PHP-function each() has been deprecated

[alexgit2k]

The PHP-function each() has been deprecated as of PHP 7.2.0 (https://wiki.php.net/rfc/deprecations_php_7_2#each), but is still used:

src/AbstractValue.php: list($type, $value) = each($xmlAsArray);
src/AbstractValue.php: list($type, $value) = each($namespaceXmlAsArray);

test/RequestTest.php: while (list(, $node) = each($result)) {
test/RequestTest.php: while (list(, $node) = each($result)) {

So each() should be replaced by foreach() which is also 10 times faster or key()/current()/next().