fix: return to firebase/php-jwt ^5.0

Author: ArWallef

composer.json

@@ -6,7 +6,7 @@
     "php": ">=5.5.9",
     "cakephp/cakephp": "^3.5",
     "google/apiclient": "^2.14",
-    "firebase/php-jwt": "~6.0",
+    "firebase/php-jwt": "~5.0",
     "raiym/instagram-php-scraper": "^0.10.0"
   },
   "require-dev": {