Disable skipLibCheck

[emmatown]

Given we generate .d.ts files and there are frequently problems with them, skipLibCheck means we either don't see the issues or we see the symptoms of issues while not seeing that the actual problem is with a .d.ts file. skipLibCheck was enabled by #7786 because TypeScript doesn't like one of Markdoc's .d.ts files. I've used patch-package to change the .d.ts file to something that TS seems okay with.

(I haven't opened an issue on Markdoc because it seems like the issue is more to do with TypeScript and I haven't reduced the problem down yet)

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Name	Status	Preview	Updated
keystone-next-docs	✅ Ready (Inspect)	Visit Preview	Aug 23, 2022 at 0:16AM (UTC)

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