[TypeScript] v7.11.2 has a hard requirement on specific TS configs

```ts
@octokit/webhooks/dist-types/types.d.ts(1,13): error TS1259: Module
'"/home/robcresswell/code/new-proj/node_modules/aggregate-error/index"'
can only be default-imported using the 'allowSyntheticDefaultImports' flag
```

This seems to have recently started popping up; adding `skipLibCheck: true` makes it go away :( 

I can push a minimal repro in a couple days if that helps too