Add gcs lib to suggest

Author: ddattee

composer.json

@@ -80,7 +80,8 @@
     "google/apiclient":"Require ^2.0 to sync to Google Drive",
     "arhitector/yandex":"Require ^2.0 to sync to Yandex Disk",
     "microsoft/azure-storage-blob": "Require ^1.4 to sync to Azure Blob Storage",
-    "phpmailer/phpmailer": "Require ^6.0 to receive logs via email"
+    "phpmailer/phpmailer": "Require ^6.0 to receive logs via email",
+    "\"google/cloud-storage\"": "Require ^1.42 to sync to Google Cloud Storage"
   },
   "bin": [
     "phpbu"