Updating README with new version history

Author: Toni Klopfenstein

README.md

@@ -29,8 +29,9 @@ Products that use this Library
 
 Version History
 ---------------
-
-* [v 1.1.0](https://github.com/sparkfun/SparkFun_Micro_OLED_Arduino_Library/tree/V_1.1.0) - Changed to remove register level pin access, for cross-platform compatibility
+* [v 1.1.2](https://github.com/sparkfun/SparkFun_Micro_OLED_Arduino_Library/tree/V_1.1.2) - Added compatibility for ESP8266
+* [v 1.1.1](https://github.com/sparkfun/SparkFun_Micro_OLED_Arduino_Library/tree/V_1.1.1) - Changed to remove register level pin access, for cross-platform compatibility
+* [v 1.1.0](https://github.com/sparkfun/SparkFun_Micro_OLED_Arduino_Library/tree/V_1.1.0) - Matching 1.6 standard
 * [V 1.0.0](https://github.com/sparkfun/SparkFun_Micro_OLED_Arduino_Library/tree/V_1.0.0) - Initial release
 
 License Information