fix(index): make sure to export the named exports

[remarkablemark]

Fixes #217

What is the motivation for this pull request?

fix(index): make sure to export the named exports

What is the current behavior?

#216 caused a regression where the named exports are not working:

./node_modules/html-react-parser/index.mjs
Can't reexport the named export 'attributesToProps' from non EcmaScript module (only default export is available)

What is the new behavior?

Reverted index.mjs back to how it was before but replaced const with var:

import HTMLReactParser from './index.js';

export default HTMLReactParser;
export var { domToReact, htmlToDOM, attributesToProps } = HTMLReactParser;

[remarkablemark]

Published v1.2.3:

npm:

npm i [email protected]

Yarn:

yarn add [email protected]