Upgrade Next.js to latest canary version

[ProchaLu]

Based on the comment from Tim Neutkens:

👋 I'm back with an update. Yesterday we landed vercel/next.js#53523 which removes on of the four processes, specifically one that would increase in memory usage under load, it would be garbage collected, but this just reduces memory usage overall. You can see the results on the description of vercel/next.js#53523. Please give it a try using npm install next@canary.

Important: in order to make that change I had to simplify the code a lot, which included removing the checks for experimental.appDir so setting it to false will no longer have an effect. I'm not expecting that to be a problem though as the idle process if you only have app (or only have pages) is only ~30-35MB. We're still working on removing that idle process too (running into some test failures).

This pull request updates the project to the latest canary version of Next.js v13.4.14-canary.1

[socket-security]

Updated dependencies detected. Learn more about Socket for GitHub ↗︎

Packages	Version	New capabilities	Transitives	Size	Publisher
next	13.4.12...13.4.14-canary.1	environment	+0/-0	54.1 MB	vercel-release-bot