Merge pull request #5 from kodus/feature/KDS-532-php8.4

Feature/kds 532 php8.4

Upgrade to simple cache 3 (#4)

* Updated PHP requirement to >=8.0 and removed mindplay/simple-cache dev-dependency

* Updated to PHPUnit ^9.5 and migrated configuration

* Updated simple-cache to ^2||^3

* Updated DatabaseCache::get signature

* Updated DatabaseCache::set signature

* Updated DatabaseCache::delete signature

* Updated DatabaseCache::clear signature

* Updated DatabaseCache::getMultiple signature

* Updated DatabaseCache::setMultiple signature

* Updated DatabaseCache::deleteMultiple signature

* Updated DatabaseCache::has signature

* Consolidated abstract test classes

* Removed interaction with `skippedTests` since it has been removed

* Changed `testSetMultipleInvalidTtl` to expect `TypeError`. Added strict typing to `DatabaseCache` and `DatabaseCacheIntegrationTest`

* Updated remaining tests that were broken by the added type hints

* Removed Scrutinizer integration

* Removed composer.lock to avoid locking packages that require PHP >=8.1

Upgrade to PHP 8.1 (#2)

* Updated PHP requirement to >=8.0 and removed mindplay/simple-cache dev-dependency

* Updated to PHPUnit ^9.5 and migrated configuration

* Removed Scrutinizer integration

* Removed composer.lock to avoid locking packages that require PHP >=8.1

* Replaced Travis with Github Actions

corrected doc-block