v1.3.0 to fix bug and optimize code

### Releases v1.3.0

1. Fix long timeout if using `IPAddress`
2. Optimize code
3. Display only successful responseText in examples
4. Improve debug messages by adding functions to display error messages instead of `cryptic error number`

Author: khoih-prog

README.md

@@ -565,9 +565,9 @@ You can also change the debugging level from 0 to 4
 
 ### Troubleshooting
 
-If you get compilation errors, more often than not, you may need to install a newer version of the `ESP32 / ESP8266 / STM32` core for Arduino.
+If you get compilation errors, more often than not, you may need to install a newer version of the `mbed_portenta` core for Arduino.
 
-Sometimes, the library will only work if you update the `ESP32 / ESP8266 / STM32` core to the latest version because I am using newly added functions.
+Sometimes, the library will only work if you update the `mbed_portenta` core to the latest version because I am using newly added functions.
 
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