Prevent exceptions on UnionTypes

[pascalheidmann]

If you have a codebase with functions that return UnionTypes this rector sadly will fail with a fatal error

Fatal error: Uncaught Error: Call to undefined method PHPStan\Type\UnionType::getClassName() in vendor/codito/rector-money/src/Rule/CurrencyAvailableWithinToCurrenciesContainsRector.php:55

 Fatal error: Call to undefined method PHPStan\Type\UnionType::getClassName() in vendor/codito/rector-money/src/Rule/MultiplyAndDivideByStringRector.php:129

This PR won't do magic like checking each type in its union but at least allow the rector to work as intended on simpler code without variable return types.

[Wirone]

Good to see someone actually used this package 🥳 I'll look at it in the evening, thanks for the contribution anyway!

[Wirone]

@pascalheidmann I've rebased your branch on top of main, which was updated with some changes in dev requirements (newer Rector, ECS, PHPStan). Now checks look better, there's only one CS issue (unused import) that must be fixed.

[Wirone]

(see comment below, did not check proper review option, I'm used to Gitlab more)

[Wirone]

Please provide ignore test fixture for scenario (like tests/Rule/MultiplyAndDivideByStringRector/Fixture/skip_int_or_string_multiplier_and_divider.php.inc) which will cover your changes 🙂

[pascalheidmann]

@Wirone I added a testcase to each rule in which no changes are detected. Hope those fit.
Maybe I find some time to add proper union type handling inside a new PR ;)

[Wirone]

Thank you for continuing your work 🍻 Even though I find those scenarios weird (PHPStan would complain about them most probably since multiply() or divide() could be invoked on non-Money values) I think this fix is needed 👍

BTW. I just found out that probably I need to change how floats passed directly as an argument are handled - these should be wrapped with sprintf() too. WDYT?

[Wirone]

Thank you @pascalheidmann 🍻

FYI: I've "fixed" errors for PHPStan in main branch, so actions here are green. I'm not fully satisfied with how it was done and I will try to improve it, but your changes can be merged anyway 🙂