PHP v8.4 upgrade and fixes

[dostrog]

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[Copilot]

Pull Request Overview

This PR upgrades the PHP version to v8.4 and applies various type and syntax improvements across the codebase while updating dependencies and test expectations.

• Upgraded PHP version and dependency versions in composer.json.
• Refactored service classes and value objects to use readonly properties and constructor property promotion.
• Updated tests to match new method signatures and replaced Safe functions with native ones where appropriate.

Reviewed Changes

Copilot reviewed 20 out of 20 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
tests/Unit/NationalBankOfUkraineTest.php	Debug output added in a test expecting an exception
tests/Unit/CacheTest.php	Replaced Safe sprintf with native sprintf
tests/TestCase.php	Enabled migration attribute and re-enabled package aliases
tests/Feature/LarateTest.php	Changed provider name assertion to allow multiple values
testbench.yaml	Introduced testbench configuration
src/StringHelper.php	Revised exception rethrow to include the previous exception
src/Services/RussianCentralBank.php	Added strict type declarations and updated error message details in parseRateData
src/Services/NationalBankOfUkraine.php	Improved float parsing with a new helper method and nullable DateTimeInterface check
src/Services/HttpService.php	Updated constructor type hint to allow a nullable Factory
src/Providers/LarateServiceProvider.php	Introduced override attribute for service registration
src/Larate.php	Updated the class to readonly and refactored the constructor using property promotion
src/Facades/LarateFacade.php	Added explicit return type for the facade accessor method
src/ExchangeRate.php	Refactored to readonly with constructor property promotion
src/CurrencyPair.php	Converted to readonly and implemented Stringable
src/Contracts/ExchangeRateService.php	Updated method signature to accept a nullable DateTimeInterface
src/Contracts/ExchangeRateProvider.php	Updated method signature to accept a nullable DateTimeInterface
src/CacheHelper.php	Updated string formatting by replacing Safe sprintf with native sprintf
composer.json	Upgraded the PHP version and bumped dependency versions
.php-cs-fixer.cache	Updated cache configuration for PHP CS Fixer

Comments suppressed due to low confidence (2)

src/Services/RussianCentralBank.php:58

• [nitpick] Consider passing the original input value or a more descriptive message instead of the literal 'false' to improve clarity in the error message.

throw new RuntimeException(trans('larate::error.badfloat', ['value' => 'false']));

tests/Unit/NationalBankOfUkraineTest.php:81

• Remove the assignment and subsequent var_dump call from this test since an exception is expected. This debug output may interfere with automated test results.

$a = $this->service->parseRateData($content, 'USD');