(fix) Updated library version number and README file

Author: abel

README.md

@@ -90,6 +90,9 @@ make tests
 **0.7.2**
 * Added a new gas limit calculation for the TransactionBroadcaster that estimates the value based on the messages in the transaction (without running the transaction simulation).
 
+**0.7.1.1**
+* Fixed Testnet network URLs
+
 **0.7.1**
 * Include implementation of the TransactionBroadcaster, to simplify the transaction creation and broadcasting process.