Added support for IE11

[gabskoro]

I must admit that I can't remember when was the last time I had such a hard time fixing an issue 😅 The bundled code is fine, it just doesn't work on IE11 giving us a Syntax error in the console.

I noticed that you are using @babel/preset-env and therefore the arrow functions transform plugin is included as it also transpiled your code. The issue was that the bundled code was always exporting module.exports=(()=>... so after a while I finally managed to find out that, in the newer version of webpack (5) you should specify arrowFunction: false in the output.environment if you don't want them to use arrow functions. So, after adding that the bundled code starts now with module.exports=function(){...

https://webpack.js.org/configuration/output/#outputenvironment

Let me please know if you will need anything else from my side :)

[Mastermindzh]

Hey @gabskoro ,

PR looks good. I'll test, marge and release a version tonight.
Thanks for the contribution.

Shouldn't need anything else, you've been thorough and actually respected the contribution guidelines. Very nice!

[Mastermindzh]

It has been released: 6.2.3

Thanks for the contribution!