support firebase/php-jwt ^7.0 to resolve firebase/[email protected] Vulnerability issue (#454)

Author: shailesh-google

composer.json

@@ -18,7 +18,7 @@
         "ext-openssl": "*",
         "ext-reflection": "*",
         "fightbulc/moment": "^1.26",
-        "firebase/php-jwt": "^6.0",
+        "firebase/php-jwt": "^7.0",
         "league/period": "^5.2",
         "php-http/client-common": "^2.0",
         "php-http/client-implementation": "^1.0",