Change or allow configuration of split chunk filename delimiter – currently tilde (~)

Do you want to request a feature or report a bug?

Feature

What is the current behavior?

Split Chunks are output to a filename containing tilde (~) characters, e.g. vendors~app-ui.js.

If the current behavior is a bug, please provide the steps to reproduce.

What is the expected behavior?

Change, or allow configuration of the character used.

If this is a feature request, what is motivation or use case for changing the behavior?

I am packaging solutions for use with SharePoint and tilde (~) is not a valid filename character in that environment.

Please mention other relevant information such as the browser version, Node.js version, webpack version, and Operating System.

Node 9.7.0
Webpack 4.1.1
Windows 7