Update library.json

Author: fpistm

library.json

@@ -7,10 +7,10 @@
     "type": "git",
     "url": "https://github.com/stm32duino/STM32RTC"
   },
-  "version": "1.1.0",
+  "version": "1.1.1",
   "frameworks": "arduino",
   "platforms": "ststm32",
   "build": {
     "libArchive": false
   }
-}
+}