Webpack: build script with eval function need to be regenerated

Problem/Motivation

Token Filter javascript builded with webpack generate eval function.
Using Strict Security Policy to avoid unsafe-eval policy with generate errors cf image.

Steps to reproduce

1. Install and enable Token_filter module
2. Enable CSP and avoid unsafe-eval
3. Login as admin and load any page

Proposed resolution

According to this documentation : https://webpack.js.org/configuration/devtool/#production
The webpack.config.js is good (devtool is omitted)
But the build tokenBrowser.js have eval function !
When the tokenBrowser is generated with same configuration the eval function disappear.