fix(testing): handle trailing commas in 14.0.0 migration

[FrozenPandaz]

Current Behavior

Expected Behavior

Trailing comma in tsconfig causes migrations to fail

Related Issue(s)

Trailing comma in tsconfig does not cause migrations to fail

Fixes #12736

[nx-cloud-staging]

☁️ Nx Cloud Report

CI is running/has finished running commands for commit ad907fa. As they complete they will appear below. Click to see the status, the terminal output, and the build insights.

📂 See all runs for this branch

---

✅ Successfully ran 12 targets

• nx affected --target=e2e --base=91e9726442b6b1b1b3e2b14eb76bbc5bd099c591 --head=ad907fa95b3f2260a9e2308d107cf752323d9eee --exclude=e2e-storybook,e2e-storybook-angular,e2e-react-native,e2e-detox,e2e-make-angular-cli-faster --parallel=1
• nx affected --target=test --base=91e9726442b6b1b1b3e2b14eb76bbc5bd099c591 --head=ad907fa95b3f2260a9e2308d107cf752323d9eee --parallel=1
• nx affected --target=build --base=91e9726442b6b1b1b3e2b14eb76bbc5bd099c591 --head=ad907fa95b3f2260a9e2308d107cf752323d9eee --parallel=3
• nx-cloud record -- yarn depcheck
• nx affected --target=lint --base=91e9726442b6b1b1b3e2b14eb76bbc5bd099c591 --head=ad907fa95b3f2260a9e2308d107cf752323d9eee --parallel=3
• nx-cloud record -- yarn nx workspace-lint
• nx-cloud record -- yarn check-lock-files
• nx-cloud record -- yarn check-commit
• nx-cloud record -- yarn nx format:check --base=91e9726442b6b1b1b3e2b14eb76bbc5bd099c591 --head=ad907fa95b3f2260a9e2308d107cf752323d9eee
• nx-cloud record -- yarn check-imports
• nx-cloud record -- yarn documentation
• nx build typedoc-theme

---

Sent with 💌 from NxCloud.

[vercel]

The latest updates on your projects. Learn more about Vercel for Git ↗︎

Name	Status	Preview	Updated
nx-dev	✅ Ready (Inspect)	Visit Preview	Oct 26, 2022 at 6:00PM (UTC)

[github-actions]

This pull request has already been merged/closed. If you experience issues related to these changes, please open a new issue referencing this pull request.