Update documentation

README.md

@@ -61,6 +61,13 @@ if __name__ == '__main__':
 
 ```
 
+#### validate_socks
+SOCKS5 proxies can be tested with the `validate_socks` method. The method takes a proxy
+string as its only argument. It returns a `requests.Response` object if the request is successful
+with no issues, otherwise it will raise an exception and the caller can decide how to proceed.
+
+For an example implementation, see [main.py](main.py). 
+
 ## Testing
 ```
 pip install -r requirements.txt