fix(deps): update dependency paragonie/constant_time_encoding to v3

Author: descope[bot]

composer.json

@@ -17,7 +17,7 @@
   "require": {
     "php": "^7.3 || ^8.0",
     "guzzlehttp/guzzle": "7.9.2 as 7.9.3",
-    "paragonie/constant_time_encoding": "2.7.0",
+    "paragonie/constant_time_encoding": "3.0.0",
     "vlucas/phpdotenv": "^5.6.1"
   },
   "require-dev": {