Update package.json

[jogibear9988]

No description provided.

[rbuckton]

tslib.es6.js predates NodeJS's support for ES Modules. If you change the "import" directive in the export map as you've proposed, NodeJS will attempt to load the file as a CommonJS module, resulting in the following error:

SyntaxError Unexpected token 'export'

The tslib.es6.js file can be used in the browser, but not in NodeJS.