fix: allow skipLibCheck: false

[mmaietta]

Tasks:

• Extract common undefined | null logic everywhere to reuse (now-exported) type Nullish
• Expose FileMatcher by removing @internal flag (why was it internal to begin with?)
• Created base type ObjectMap to reduce writing { [key: string]: <anything> } everywhere.
• Updated eslint to register test/tsconfig.json
• Fixes skipLibCheck: false by forcing UUID.ts to return a Buffer instead of Buffer<ArrayBuffer>, which the compiler doesn't like depending on version of node you're on

This should fix: #8812

[changeset-bot]

🦋 Changeset detected

Latest commit: 7b356e9

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 12 packages

Name	Type
app-builder-lib	Patch
builder-util	Patch
builder-util-runtime	Patch
dmg-builder	Patch
electron-builder-squirrel-windows	Patch
electron-builder	Patch
electron-forge-maker-appimage	Patch
electron-forge-maker-nsis-web	Patch
electron-forge-maker-nsis	Patch
electron-forge-maker-snap	Patch
electron-publish	Patch
electron-updater	Patch

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[t3chguy]

Created base type ObjectMap to reduce writing { [key: string]: } everywhere.

That sounds like Record<K, V>, no?

[mmaietta]

Haha yep, that is what I was looking for. Will swap that in

[mmaietta]

Turns out Record doesn't work with the scheme.json generator, but I'll find a middle ground.