stevenmaguire/oauth2-keycloak 4.0.0

Security update, remove some old PHP, update JWT

on PHP Packagist

Added

• Allowed firebase/php-jwt 6
• Add PHP test and compatibility for 7.2 and higher

Deprecated

• PHP version checks 5.6, 7.0 and 7.1

Fixed

• Allowed JWT version 6, due to CVE in older versions
• Fixed deprecated redirecturl if version field is set to 18.0.0 and higher PR#54

Removed

• PHP version checks 5.6, 7.0 and 7.1

Security

• Allowed JWT version 6, due to CVE in older versions