Added "version" to returned Keycloak provider's options

Hello there!

Added version key to returned Keycloak provider's options and dropped legacy PHP 7.2 & 7.3 support - hello PHP 7.4 syntax in the code!

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v2.13.0

Feb 2nd, 2023

What's Changed

• KeycloakProviderConfigurator.getProviderOptions() : add version to returned options array by @pubphanguyen in #391
• Drop legacy PHP support by @bocharsky-bw in #389
• Apply changes required by PHP CS Fixer and fix PHP 8.2 build by @bocharsky-bw in #388

New Contributors

• @pubphanguyen made their first contribution in #391

Full Changelog: v2.12.0...v2.13.0