Version 1.2.4

* Update firebase/php-jwt to v5.0.0 ( https://github.com/firebase/php-jwt )
* Add Requires PHP Tag

Author: Tmeister

composer.json

@@ -3,7 +3,7 @@
         "vendor-dir": "includes/vendor"
     },
     "require": {
-        "firebase/php-jwt": "^3.0"
+        "firebase/php-jwt": "^5.0.0"
     },
     "require-dev": {
         "phpunit/phpunit": "^5.2",