Javascript Lint Show Error When Using Async and/or Await

[ProdigyView]

I am using await and async in my Javascript code, and I am getting this "error" (its not, but its being reported as such.

https://drive.google.com/file/d/1PUCal959jFAMA3UgQlTcx7TKhfhHrBw2/view?usp=sharing

And my Javascript is such:

javacriptCodeEditor = window.CodeMirror.fromTextArea(document.getElementById('widget-javascript-container'), {
                        lineNumbers: true,
                        extraKeys: {
                            "Ctrl-Space": "autocomplete"
                        },
                        mode: {
                            name: "javascript",
                            globalVars: true
                        },
                        matchBrackets: true,
                        gutters: ["CodeMirror-lint-markers"],
                        autoCloseBrackets: true,
                        lint: {
                            esversion: 6
                        }
                    });

Is this a bug or am I doing something wrong?

[marijnh]

Use a newer version of jshint, I guess? I've upgraded the demo in attached patch.