Impossible to build project with Parcel or Rollup

[layershifter]

Bug Report

The same problem as in #497.

Steps

1. Prepare project

git clone https://github.com/rollup/rollup-starter-app
cd rollup-starter-app
yarn
yarn add @stardust-ui/react react react-dom
yarn dev

2. Paste code

import React from "react";
import ReactDOM from "react-dom";
import { Button, Provider, themes } from "@stardust-ui/react";

ReactDOM.render(
  React.createElement(
    Provider,
    { theme: themes.teams },
    React.createElement(Button, {
      content: "Theming",
      icon: "arrow right",
      iconPosition: "after",
      primary: true
    })
  ),
  document.getElementById("root")
);

Expected Result

Everything works.

Actual Result

Version

0.13.0

[layershifter]

It happens because we importing classnames as namespace in dist code, however classnames exports default instead of namespace.

Fix:

-import * as cx from 'classnames'
+import cx from 'classnames'

DefinitelyTyped/DefinitelyTyped#25205
DefinitelyTyped/DefinitelyTyped#25206

[layershifter]

palantir/blueprint#2221
palantir/blueprint#2200

However, not sure that it's the best idea to change tsconfig.json in this case.