Support ES6 syntax / arrow functions

[mmagyar]

Currently the plugin will respond with a syntax error message if there are ES6 contructs in the code like fat arrow functions

[asgerf]

There should now be support for some ES6 syntax such as arrow functions, let bindings, and default parameter values. Classes are not supported.

Please try it out and report back. I haven't tested it very well since I don't have any good tests that use ES6 features.

[mmagyar]

Thanks!
It works great with arrow function, handles 'this' correctly as well, let and const are okay too.

[bruslim]

doesn't handle import

[asgerf]

There should now be basic support for import and export.

Note that multi-file renaming is still not supported (and is not planned), but it does not crash any more when your file has an import or export.

[bruslim]

handles import and export 👍