Enums are not transpliling correctly

[agubler]

Bug

The enums in widgets that use the keyword const in their declaration are not transpiled correctly.

Removing the const keyword ensures that they are correctly transpiled.

Example Enum declarations:

// This does not transpile correctly
export const enum BrokenEnum { 
    a = 0
}

// transpiles correctly
export enum CorrectEnum { 
    a = 0
}

Transpiled output (missing BrokenEnum):

define(["require", "exports"], function (require, exports) {
    "use strict";
    Object.defineProperty(exports, "__esModule", { value: true });
    var CorrectEnum;
    (function (CorrectEnum) {
        CorrectEnum[CorrectEnum["a"] = 0] = "a";
    })(CorrectEnum = exports.CorrectEnum || (exports.CorrectEnum = {}));
});