Investigate Babel warning in rspec output

[mikeapp]

Story

There are multiple instances of a babel warning in the rspec output:

Though the "loose" option was set to "false" in your @babel/preset-env config, it will not be used for @babel/plugin-proposal-private-methods since the "loose" mode option was set to "true" for @babel/plugin-proposal-class-properties.
The "loose" option must be the same for @babel/plugin-proposal-class-properties, @babel/plugin-proposal-private-methods and @babel/plugin-proposal-private-property-in-object (when they are enabled): you can silence this warning by explicitly adding
	["@babel/plugin-proposal-private-methods", { "loose": true }]
to the "plugins" section of your Babel config.

See rails/webpacker#3008

Acceptance

• Investigate the fix and determine level of effort.

[K8Sewell]

Have a draft PR up that attempted to upgrade webpacker like some of the resolutions offered in the linked webpacker issue but there were still warnings output in the CI spec run so still investigating other offered solutions in that issue thread.

[K8Sewell]

PR ready for review - yalelibrary/yul-dc-management#804 no more babel output in the CI spec run. I'm not positive upgrading webpacker was essential but doesn't hurt right? I can pull that upgrade out of this PR if that's preferred.

[FCRodriguez7]

Released management v2.49.7