change readme

Author: simonkoeck

README.md

@@ -57,7 +57,7 @@ cee
   });
 ```
 
-### execute(_input_, _language_, _args_, _stdin_) → Promise<String>
+### execute(_input_, _language_, [_args_], [_stdin_], [_options_]) → Promise<String>
 
 Returns the result (stdout) of the executed code. If stderr is not empty, an exception will be thrown with the content of stderr.
 
@@ -77,6 +77,8 @@ Returns the result (stdout) of the executed code. If stderr is not empty, an exc
 
 ## Supported Languages
 
+Get the supported languages on your platform with `cee.getSupportedLanguages();`
+
 |              | Linux / MacOS | Windows |
 | :----------: | :-----------: | :-----: |
 |  `Python3`   |      ✔️       |   ✔️    |