refactor: upgraded frontend-build version to v12

[BilalQamar95]

TL;DR - [Eslint was updated in frontend-build version resulting in it's version being bumped to v12. In order to reciprocate eslint version update, this PR updated frontend-build version to v12.0.0.]

GIT Ticket: 42: Upgrade eslint to v8.x

What changed?

• Updated frontend-build to v12
• Resolved eslint issues

Developer Checklist

• [ ] Test suites passing
• [ ] Documentation and test plan updated, if applicable
• [ ] Received code-owner approving review
• [ ] Bumped version number package.json

Testing Instructions

[ How should a reviewer test this PR? ]

Reviewer Checklist

Collectively, these should be completed by reviewers of this PR:

• [ ] I've done a visual code review
• [ ] I've tested the new functionality

FYI: @openedx/content-aurora

[codecov[bot]]

Codecov Report

Base: 100.00% // Head: 100.00% // No change to project coverage :thumbsup:

Coverage data is based on head (a9d7878) compared to base (85607d7). Patch coverage: 100.00% of modified lines in pull request are covered.

Additional details and impacted files

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[muselesscreator]

We would much rather exclude some of these new and not-agreed-on eslint rules than update the style for our whole repo. If there are new-mismatching rules, please set up ignores for them and create a ticket for us to review the new eslint rules.

[arbrandes]

@BilalQamar95, looks like @muselesscreator requested some changes. Can we update the eslint rules for this repo to make the PR more palatable?

[BilalQamar95]

@BilalQamar95, looks like @muselesscreator requested some changes. Can we update the eslint rules for this repo to make the PR more palatable?

@arbrandes, the comment from @muselesscreator triggered a thread on edx internal slack in result of which there was a PR merged disabling some rules that were deemed unnecessary. This PR was updated afterwards, in light of those changes. If there are still new or not-agreed-on eslint rules in the PR I would be happy to revise those.

[arbrandes]

@BilalQamar95, thanks for the update! Can you please fix the conflicts so we can merge this?

@muselesscreator, mind giving us the green light officially? If you're not available or don't have time, we'll go ahead and merge it.

[BilalQamar95]

@arbrandes I have resolved all the merge conflicts.