Error in JaneObjectNormalizer after updating symfony/serializer to 7.x

[theteknocat]

After updating the symfony/serializer package from 6 to 7, the following error is generated:

Declaration of JoliCode\Harvest\Api\Normalizer\JaneObjectNormalizer::denormalize($data, $class, $format = null, array $context = []) must be compatible with Symfony\Component\Serializer\Normalizer\DenormalizerInterface::denormalize(mixed $data, string $type, ?string $format = null, array $context = []): mixed

There is also a similar error for the normalize method. The symfony/serializer is a dependency of jane-php/open-api-runtime, though it is just a dev requirement and doesn't need to be used in production deployments. It will happily use versions ^5.4, ^6.4 or ^7.0 of the serializer, so not everyone will necessarily run into this if whatever project they are using this library in does not end up installing a 7.x version of the serializer. It would all depend on how composer determines which set of packages are needed to make all the dependencies work.

I ran a composer update on Laravel 9 with PHP 8.2 and it upgraded the serializer from 6 to 7. It's easy enough to update the JaneObjectNormalizer to be compatible, but that may impact it's compatibility with older versions. I don't know the best way to handle that, but I will submit a pull request to provide a patch and leave it to people who are smarter than be to figure out how to make it compatible with all possible versions that may be used.

[theteknocat]

In further testing, it seems there are many normalizers with incompatible code, so I'll update the pull request with all of them updated.

[theteknocat]

Resolved by #47.