Webpack warnings

[dacook]

What we should change and why (this is tech debt)

Webpacker is outputting lots of warnings which get in the way. Some of them are really big and repeated. Also maybe we should fix stuff.

• Update caniuse-lite #13120

Browserslist: caniuse-lite is outdated. Please run:
  npx update-browserslist-db@latest
  Why you should do it regularly: https://github.com/browserslist/update-db#readme

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• DEPRECATION WARNING

DEPRECATION WARNING: Using / for division is deprecated and will be removed in Dart Sass 2.0.0.
...
node_modules/foundation-sites/scss/foundation/_functions.scss 47:11
...

This is due to the old version of foundation. Supposedly it was fixed in #10699, but that fix no longer seems to be working

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• You did not set any plugins, parser, or stringifier.

You did not set any plugins, parser, or stringifier. Right now, PostCSS does nothing. Pick plugins for your case on https://www.postcss.parts/ and use them in postcss.config.js.