chore(version): library version 1.2.1

Author: ruleechen

library.json

@@ -18,7 +18,7 @@
     "type": "git",
     "url": "https://github.com/Mixiaoxiao/Arduino-HomeKit-ESP8266.git"
   },
-  "version": "1.2.0",
+  "version": "1.2.1",
   "license": "MIT",
   "frameworks": "arduino",
   "platforms": "espressif8266",