Silence noisy warning when building @tupaia/ui-components

[rohan-bes]

We currently see a lot of this warning when building ui-components:

[ui-components] 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-private-property-in-object.
[ui-components] 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
[ui-components]         ["@babel/plugin-proposal-private-methods", { "loose": true }]
[ui-components] to the "plugins" section of your Babel config.

So I followed the recommendation to silence the warning