Fix yarn warnings

[compwron]

When you pick up this issue, re-run yarn upgrade to get a new list of warnings. Here are the ones right now:

warning @rails/webpacker > webpack > watchpack > watchpack-chokidar2 > [email protected]: Chokidar 2 will break on node v14+. Upgrade to chokidar 3 with 15x less dependencies.
warning @rails/webpacker > webpack > watchpack > watchpack-chokidar2 > chokidar > [email protected]: fsevents 1 will break on node v14+ and could be using insecure binaries. Upgrade to fsevents 2.
warning @rails/webpacker > postcss-preset-env > postcss-color-gray > postcss-values-parser > [email protected]: flatten is deprecated in favor of utility frameworks such as lodash.
warning @rails/webpacker > webpack > node-libs-browser > url > [email protected]: The querystring API is considered Legacy. new code should use the URLSearchParams API instead.
warning @rails/webpacker > optimize-css-assets-webpack-plugin > cssnano > cssnano-preset-default > postcss-svgo > [email protected]: This SVGO version is no longer supported. Upgrade to v2.x.x.
warning @rails/webpacker > webpack > micromatch > snapdragon > source-map-resolve > [email protected]: https://github.com/lydell/resolve-url#deprecated
warning @rails/webpacker > webpack > micromatch > snapdragon > source-map-resolve > [email protected]: Please see https://github.com/lydell/urix#deprecated
warning node-sass > [email protected]: request has been deprecated, see https://github.com/request/request/issues/3142
warning node-sass > node-gyp > [email protected]: request has been deprecated, see https://github.com/request/request/issues/3142
warning node-sass > request > [email protected]: this library is no longer supported
warning node-sass > request > [email protected]: Please upgrade  to version 7 or higher.  Older versions may use Math.random() in certain circumstances, which is known to be problematic.  See https://v8.dev/blog/math-random for details.
warning [email protected]: You can find the new Popper v2 at @popperjs/core, this package is dedicated to the legacy v1
warning cypress > @cypress/request > [email protected]: this library is no longer supported
warning markdown-toc > gray-matter > [email protected]: CoffeeScript on NPM has moved to "coffeescript" (no hyphen)
warning markdown-toc > remarkable > autolinker > [email protected]: Removed event-stream from gulp-header
warning webpack-dev-server > [email protected]: Chokidar 2 will break on node v14+. Upgrade to chokidar 3 with 15x less dependencies.
warning webpack-dev-server > sockjs > [email protected]: Please upgrade  to version 7 or higher.  Older versions may use Math.random() in certain circumstances, which is known to be problematic.  See https://v8.dev/blog/math-random for details.
warning webpack-dev-server > webpack-log > [email protected]: Please upgrade  to version 7 or higher.  Older versions may use Math.random() in certain circumstances, which is known to be problematic.  See https://v8.dev/blog/math-random for details.
[3/5] 🚚  Fetching packages...
[4/5] 🔗  Linking dependencies...
warning " > @webpack-cli/[email protected]" has unmet peer dependency "[email protected]".
warning " > [email protected]" has unmet peer dependency "webpack@^4.0.0 || ^5.0.0".
warning "webpack-dev-server > [email protected]" has unmet peer dependency "webpack@^4.0.0 || ^5.0.0".
[5/5] 🔨  Rebuilding all packages...