Removing Atob Package.

[mbostwick]

This PR contains a:

• [X ] bugfix
• [ ] new feature
• [ ] code refactor
• [ ] test update
• [ ] typo fix
• [ ] metadata update

Motivation / Use-Case

Removes abab which using that packages shows a warning any time this package is used..

Solves https://github.com/webpack-contrib/source-map-loader/issues/225

Breaking Changes

This forces users to use node 16, as that is when abab became standard. However, all things should be on node 18 by this point.

Additional Info

[linux-foundation-easycla[bot]]

The committers listed above are authorized under a signed CLA.

• :white_check_mark: login: mbostwick / name: Michael Bostwick (a3e0667270ab329fd4763e21f3914314944166be)