Fix: avoid deprecated callable pattern in PHP 8.2

[justin-at-bounteous]

No description provided.

[damienwebdev]

@justin-at-bounteous I like this! Can you add a test that exposes the original behavior? I added CI coverage for PHP 8.2. I would like to verify that this code is also backward-compatible with older PHP versions.

[justin-at-bounteous]

I tried it with 8.1 as well. I think ::class should work from >=5.5

[damienwebdev]

@justin-at-bounteous this package supports compatibility with Magento v2.3.7 which uses php 7.4. If you add a test highlighting the break of the old code against php 8.2, that will be enough to at least showcase how the fix would/wouldn't break on php7.4

[justin-at-bounteous]

@damienwebdev UniqueExecutorTest is passing for me both with and without my change in place.

[damienwebdev]

It should be sufficient to raise the error_reporting level to trigger a throw when the deprecation warning arises. This should not fail in 8.1, but fail in 8.2.