Plugin compatible with PHP 7.3 ?

I did the compatibility test with the PHP 7.3 and i got that some functions decrepted in 7.1 and removed in 7.2 we are afraid to update and loss the plugin functionality.

The result below:

FOUND 30 ERRORS AFFECTING 4 LINES
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 715 | ERROR | Function mcrypt_get_iv_size() is deprecated since PHP 7.1 and removed since PHP 7.2; Use OpenSSL instead
 715 | ERROR | Extension 'mcrypt' is deprecated since PHP 7.1 and removed since PHP 7.2; Use openssl (preferred) or pecl/mcrypt once available instead
 715 | ERROR | The constant "MCRYPT_RIJNDAEL_128" is deprecated since PHP 7.1 and removed since PHP 7.2
 715 | ERROR | The constant "MCRYPT_MODE_CBC" is deprecated since PHP 7.1 and removed since PHP 7.2
 715 | ERROR | Function mcrypt_get_iv_size() is deprecated since PHP 7.1 and removed since PHP 7.2; Use OpenSSL instead
 715 | ERROR | Extension 'mcrypt' is deprecated since PHP 7.1 and removed since PHP 7.2; Use openssl (preferred) or pecl/mcrypt once available instead
 715 | ERROR | The constant "MCRYPT_RIJNDAEL_128" is deprecated since PHP 7.1 and removed since PHP 7.2
 715 | ERROR | The constant "MCRYPT_MODE_CBC" is deprecated since PHP 7.1 and removed since PHP 7.2
 733 | ERROR | Function mcrypt_create_iv() is deprecated since PHP 7.1 and removed since PHP 7.2; Use random_bytes() or OpenSSL instead
 733 | ERROR | Extension 'mcrypt' is deprecated since PHP 7.1 and removed since PHP 7.2; Use openssl (preferred) or pecl/mcrypt once available instead
 733 | ERROR | The constant "MCRYPT_RAND" is deprecated since PHP 7.1 and removed since PHP 7.2
 733 | ERROR | Function mcrypt_create_iv() is deprecated since PHP 7.1 and removed since PHP 7.2; Use random_bytes() or OpenSSL instead
 733 | ERROR | Extension 'mcrypt' is deprecated since PHP 7.1 and removed since PHP 7.2; Use openssl (preferred) or pecl/mcrypt once available instead
 733 | ERROR | The constant "MCRYPT_RAND" is deprecated since PHP 7.1 and removed since PHP 7.2
 745 | ERROR | Function mcrypt_encrypt() is deprecated since PHP 7.1 and removed since PHP 7.2; Use OpenSSL instead
 745 | ERROR | Extension 'mcrypt' is deprecated since PHP 7.1 and removed since PHP 7.2; Use openssl (preferred) or pecl/mcrypt once available instead
 745 | ERROR | The constant "MCRYPT_RIJNDAEL_128" is deprecated since PHP 7.1 and removed since PHP 7.2
 745 | ERROR | The constant "MCRYPT_MODE_CBC" is deprecated since PHP 7.1 and removed since PHP 7.2
 745 | ERROR | Function mcrypt_encrypt() is deprecated since PHP 7.1 and removed since PHP 7.2; Use OpenSSL instead
 745 | ERROR | Extension 'mcrypt' is deprecated since PHP 7.1 and removed since PHP 7.2; Use openssl (preferred) or pecl/mcrypt once available instead
 745 | ERROR | The constant "MCRYPT_RIJNDAEL_128" is deprecated since PHP 7.1 and removed since PHP 7.2
 745 | ERROR | The constant "MCRYPT_MODE_CBC" is deprecated since PHP 7.1 and removed since PHP 7.2
 753 | ERROR | Function mcrypt_decrypt() is deprecated since PHP 7.1 and removed since PHP 7.2; Use OpenSSL instead
 753 | ERROR | Extension 'mcrypt' is deprecated since PHP 7.1 and removed since PHP 7.2; Use openssl (preferred) or pecl/mcrypt once available instead
 753 | ERROR | The constant "MCRYPT_RIJNDAEL_128" is deprecated since PHP 7.1 and removed since PHP 7.2
 753 | ERROR | The constant "MCRYPT_MODE_CBC" is deprecated since PHP 7.1 and removed since PHP 7.2
 753 | ERROR | Function mcrypt_decrypt() is deprecated since PHP 7.1 and removed since PHP 7.2; Use OpenSSL instead
 753 | ERROR | Extension 'mcrypt' is deprecated since PHP 7.1 and removed since PHP 7.2; Use openssl (preferred) or pecl/mcrypt once available instead
 753 | ERROR | The constant "MCRYPT_RIJNDAEL_128" is deprecated since PHP 7.1 and removed since PHP 7.2
 753 | ERROR | The constant "MCRYPT_MODE_CBC" is deprecated since PHP 7.1 and removed since PHP 7.2

And if you guys think this test is not accurate can you guide me how to practice a test on a plugin to make sure of its compatibility with the newer php versions ?

Best Regards

The page I need help with: [log in to see the link]