Bump nuxt from 2.6.1 to 2.6.2 in /webapp

Sourced from nuxt's releases.

v2.6.2

Fixes

• cli: Apply nuxt.config.js changes and watch for all imported files (#5500)
• cli: Fix problem for users that have tsconfig.json but do not use typescript (#5478)
• cli: Show memory usage after build for nuxt dev (#5514)
• server Fix bug with SPA mode with CSP enabled (#5474)
• vue-renderer: Use modulepreload for modern mode when using spa generate (#5489)
• webpack: Suggest using official @nuxtjs/style-resources package (#5499)
• Custom router.base support for banner url and loading screen (#5470) (nuxt/loading-screen#8)

Security Fixes

• Prevent potential XSS vulnerabiliy when using vuex-router-sync (nuxt/devalue#8) (vuejs/vuex-router-sync#89)

Thanks to our awesome contributors to this release

• Damian Stasik (@​visualfanatic)
• Andreas Zoellner (@​zoellner)
• Vasyl Boroviak (@​koresar)

• 8d14cd4 Merge branch 'dev' into 2.x
• 0849684 sync readme
• afd8a40 v2.6.2
• 6cee893 v2.6.2
• ff340ab v2.6.2 (#5523)
• 1309a52 chore(deps): lock file maintenance (#5534)
• 6927f6d add external authors to the release notes
• 6db8ec9 chore(deps): update all non-major dependencies (#5533)
• 0d5dfe7 chore(deps): update all non-major dependencies (#5529)
• a764cbc chore: better release-notes script (#5524)
• Additional commits viewable in compare view

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