* The signature of method `NodeDefinition::setDeprecated()` has been updated to `NodeDefinition::setDeprecated(string $package, string $version, string $message)`.
* The signature of method `BaseNode::setDeprecated()` has been updated to `BaseNode::setDeprecated(string $package, string $version, string $message)`.
* The signature of method `Definition::setDeprecated()` has been updated to `Definition::setDeprecation(string $package, string $version, string $message)`.
* The signature of method `Alias::setDeprecated()` has been updated to `Alias::setDeprecation(string $package, string $version, string $message)`.
* The signature of method `DeprecateTrait::deprecate()` has been updated to `DeprecateTrait::deprecation(string $package, string $version, string $message)`.
* Deprecated the `Psr\Container\ContainerInterface` and `Symfony\Component\DependencyInjection\ContainerInterface` aliases of the `service_container` service,
* Not configuring the `rounding_mode` option of the `PercentType` is deprecated. It will default to `\NumberFormatter::ROUND_HALFUP` in Symfony 6.
* Not passing a rounding mode to the constructor of `PercentToLocalizedStringTransformer` is deprecated. It will default to `\NumberFormatter::ROUND_HALFUP` in Symfony 6.
* Added argument `callable|null $filter` to `ChoiceListFactoryInterface::createListFromChoices()` and `createListFromLoader()` - not defining them is deprecated.
* Using `Symfony\Component\Form\Extension\Validator\Util\ServerParams` class is deprecated, use its parent `Symfony\Component\Form\Util\ServerParams` instead.
* Deprecated the `SesApiTransport` class. It has been replaced by SesApiAsyncAwsTransport Run `composer require async-aws/ses` to use the new classes.
* Deprecated the `SesHttpTransport` class. It has been replaced by SesHttpAsyncAwsTransport Run `composer require async-aws/ses` to use the new classes.
* The signature of method `OptionsResolver::setDeprecated()` has been updated to `OptionsResolver::setDeprecated(string $option, string $package, string $version, $message)`.
* Deprecated `OptionsResolverIntrospector::getDeprecationMessage()`, use `OptionsResolverIntrospector::getDeprecation()` instead.
* Added support for parsing numbers prefixed with `0o` as octal numbers.
* Deprecated support for parsing numbers starting with `0` as octal numbers. They will be parsed as strings as of Symfony 6.0. Prefix numbers with `0o`