Webpack-bundled Swiper breaks in IE11

[Kurzdor]

This is a (multiple allowed):

• bug

• enhancement

• feature-discussion (RFC)

• Swiper Version: 4.3.3

• Platform/Target and Browser Versions: All Platforms, with >= 0.25% usage browsers and Safari >= 6

• Live Link or JSFiddle/Codepen or website with issue: *

What you did

I am using Swiper in my project which has Gulp+Webpack+babel-loader underhood. (Importing it like ES6 module).
Webpack config is here: https://pastebin.com/zT7N1vpW

As you see I have excluded the node_modules folder from transpiling modules as it is recommended here: facebook/create-react-app#1125.

And I get syntax errors in IE11 for Swiper's dependency, Dom7.
For example: https://imgur.com/a/NAgJSuB

If i include dom7 folder in node_modules it gives me another error with Swiper:
https://imgur.com/a/Qokhxki

The same issue was in other package here:
selfrefactor/rambdax#4
and here
selfrefactor/rambda#52

When I remove exclude: /node_modules/ line it doesn't break anymore but takes long time to build.

Expected Behavior

Webpack-bundled Swiper works good and without any troubles in IE11.

Actual Behavior

Webpack-bundled Swiper works good in IE11.

Thanks!