chore: lockfile cleanup

[slorber]

Motivation

Fix unstable lockfile after v1 cleanuup PR + upgrade deps

Had an ESLint issue (FB header in CLI with shebang: Stuk/eslint-plugin-header#39). Disabled in 3 places, we'll see if we can re-enable this later

Test Plan

tests

[netlify]

✔️ [V2]

🔨 Explore the source changes: db8c8de

🔍 Inspect the deploy log: https://app.netlify.com/sites/docusaurus-2/deploys/60c219c49cabea00088a9004

😎 Browse the preview: https://deploy-preview-4944--docusaurus-2.netlify.app

[github-actions]

⚡️ Lighthouse report for the changes in this PR:

Category	Score
🟠 Performance	51
🟢 Accessibility	97
🟢 Best practices	100
🟢 SEO	100
🟢 PWA	95

Lighthouse ran on https://deploy-preview-4944--docusaurus-2.netlify.app/

[github-actions]

Size Change: +663 B (0%)

Total Size: 621 kB

Filename	Size	Change
website/build/assets/js/main.********.js	444 kB	+663 B (0%)

ℹ️ View Unchanged

Filename	Size	Change
website/build/assets/css/styles.********.css	87.8 kB	0 B
website/build/blog/2017/12/14/introducing-docusaurus/index.html	62.1 kB	0 B
website/build/docs/introduction/index.html	235 B	0 B
website/build/index.html	27 kB	0 B

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