Bump pyvesync version to 3.1.2 (home-assistant#154650)

Co-authored-by: Franck Nijhof <[email protected]>

Author: cdnninja

homeassistant/components/vesync/manifest.json

@@ -13,5 +13,5 @@
   "documentation": "https://www.home-assistant.io/integrations/vesync",
   "iot_class": "cloud_polling",
   "loggers": ["pyvesync"],
-  "requirements": ["pyvesync==3.1.0"]
+  "requirements": ["pyvesync==3.1.2"]
 }