TASK: Update firebase/php-jwt from 5.2 to 6.0 (#40)

Author: meyyappanv

composer.json

@@ -16,7 +16,7 @@
         }
     },
     "require": {
-        "firebase/php-jwt": "^5.2",
+        "firebase/php-jwt": "^6.0",
         "guzzlehttp/guzzle": "^7.0.1",
         "webmozart/assert": "^1.0"
     },