Implement Seal and Open in RSA

[maymeow]

If you look in To the

https://github.com/MayMeow/php-cryptography/blob/7b0ef00c5bea07053ffb26440c78042c701a1310/src/RSACryptoServiceProvider.php#L78

or

https://github.com/MayMeow/php-cryptography/blob/7b0ef00c5bea07053ffb26440c78042c701a1310/src/RSACryptoServiceProvider.php#L83

There are missing functions, they need implement openssl_seal and openssl_open for the reference you can look at https://www.php.net/manual/en/ref.openssl.php