chore: add support for firebase/php-jwt v6.0 for CVE-2021-46743 (#2235)

Author: SebLevDev

composer.json

@@ -9,7 +9,7 @@
         "php": "^5.6|^7.0|^8.0",
         "google/auth": "^1.10",
         "google/apiclient-services": "~0.200",
-        "firebase/php-jwt": "~2.0||~3.0||~4.0||~5.0",
+        "firebase/php-jwt": "~2.0||~3.0||~4.0||~5.0||~6.0",
         "monolog/monolog": "^1.17||^2.0",
         "phpseclib/phpseclib": "~2.0||^3.0.2",
         "guzzlehttp/guzzle": "~5.3.3||~6.0||~7.0",