STCLI-187: Update webpack to v5

[mkuklis]

https://issues.folio.org/browse/STCLI-187

There is a corresponding PR in stripes-webpack folio-org/stripes-webpack#36 which will need to be merged first in order for this one to pass.

[zburke]

@mkuklis, thinking through this again, it feels like webpack should be a direct-dep here but a peer-dep in stripes-webpack. That would force both repos to agree on using the same version. And then it would make sense for this to be a major-version-bump in stripes-webpack (bumping a major version of a peer always means bumping your own major). Otherwise, as-is, webpack is just an interal dep in stripes-webpack and there's no reason to bump the version there at all if we're not changing the external API of that package.

I realize we have discussed the fact that "stripes-cli is probably the wrong conduit for commands that are simply funneled straight through to stripes-webpack", so maybe it's fine to ignore this for now, knowing we want to make other bigger changes later. But when later comes, I think it's something to consider.

[mkuklis]

@zburke thank you for sharing your thoughts. I agree. Let me test couple more things here.

[mkuklis]

@zburke I moved webpack to peerDependencies in stripes-webpack. I also had to list it under devDependencies because we need it there to run tests.

[sonarqubecloud]

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