Bugfix/serializable validation errors

[mjervis]

Summary

Checklist

• [* ] Added changelog entry
• [x ] Ran unit tests (Check the README for instructions)

php ./vendor/bin/phpcs --config-set show_progress 1
Using config file: /braintree-php/vendor/squizlabs/php_codesniffer/CodeSniffer.conf

Config value "show_progress" added successfully
php ./vendor/bin/phpcs --config-set colors 1
Using config file: /braintree-php/vendor/squizlabs/php_codesniffer/CodeSniffer.conf

Config value "colors" added successfully
php ./vendor/bin/phpcs --config-set php_version 70300
Using config file: /braintree-php/vendor/squizlabs/php_codesniffer/CodeSniffer.conf

Config value "php_version" added successfully
php ./vendor/bin/phpcs --standard=phpcs.xml --report=summary -s lib tests
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Time: 4.52 secs; Memory: 66.01MB

php ./vendor/bin/phpunit --testsuite unit --do-not-cache-result
PHPUnit 9.5.13 by Sebastian Bergmann and contributors.

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........................................................PHP Deprecated:  Return type of Braintree\Error\Validation::jsonSerialize() should either be compatible with JsonSerializable::jsonSerialize(): mixed, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /braintree-php/lib/Braintree/Error/Validation.php on line 50
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Time: 00:00.372, Memory: 12.00 MB

OK (360 tests, 1077 assertions)

• [x ] I understand that unless this is a Draft PR or has a DO NOT MERGE label, this PR is considered to be in a deploy ready state and can be deployed if merged to main

[crookedneighbor]

Though this warning in the console seems like it should be addressed:

PHP Deprecated: Return type of Braintree\Error\Validation::jsonSerialize() should either be compatible with JsonSerializable::jsonSerialize(): mixed, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /braintree-php/lib/Braintree/Error/Validation.php on line 50

[mjervis]

Fixed the code style issues, not sure how I got those in TBH , I'd run the linter.

How did you get the console error? Running the unit tests and the tests doesn't throw these up?

I've fixed it inline with the other JsonSerializeable methods in the existing codebase.

[hollabaq86]

hey folks, thanks for the PR! We'll take a look and provide feedback/merge.

For braintree folks, ticket 2047