Support both versions of PHP JWT

Author: BVMiko

composer.json

@@ -13,7 +13,7 @@
     ],
     "require": {
         "php": ">=5.3.0",
-        "firebase/php-jwt": "~5.0",
+        "firebase/php-jwt": "~3.0|~5.0",
         "paragonie/random_compat": "~1.4|~2.0"
     },
     "require-dev": {