chore(deps): update dependency monolog/monolog to v3

Author: renovate-bot

appengine/standard/laravel-framework/composer.json

@@ -1,6 +1,6 @@
 {
     "require-dev": {
-        "monolog\/monolog": "^2.0",
+        "monolog\/monolog": "^3.0",
         "google/cloud-logging": "^1.14"
     }
 }