Fix deprecation notice on dynamic property (PHP 8.2)

[gquemener]

This is the only issue I've ran into while running the test suite on PHP 8.2.

[rvanlaak]

Would be great to get this merged! Any plans on thereafter supporting 8.2 on the composer.json as well? That would allow MoneyPHP to thereafter support 8.2 as well.

[gquemener]

There's a circular dependency between phpspec and prophecy that prevents CI pipelines to run on 8.2.

I would advise to merge prophecy first, but I let you decide on the best strategy here @ciaranmcnulty :)

[gquemener]

FYI, I have updated both pipeline config to run against 8.2, as well as increasing php support range in composer.json.

[andypost]

I think it makes sense to commit as bugfix to allow more people to install it, maybe CI can add --ignore-platform-req=php while phpspec/prophecy/labels/PHP8.2 is not allowed to install dependency

[mkoprek]

Dependencies are resolved (phpspec/prophecy#571), can some one try to ryn pipelines again?

[internalsystemerror]

@gquemener Are you able to retrigger CI? Or does it need a maintainer?