Drop openssl-legacy-provider parameter

[pjonsson]

Forcing terser-webpack-plugin to be version 4 alleviates the need for the --openssl-legacy-provider.

[pjonsson]

@nf-s Is yarn install --frozen-lockfile && yarn upgrade, committing the new lock file, and then edit package.json+run yarn install how one is supposed to update package dependencies? And do I need to run these commands in node:16 image, or can I use the node:20 image just as well?

[ljowen]

@pjonsson Thanks for your contribution, that approach will work, you can also upgrade a specific dependency and version with yarn upgrade <package-name>@<version>. The lockfile will be used regardless of node version though it's good practice to test multiple version when upgrading a package