fix(types): correct rootDir in tsconfig.json

[aloisklink]

📑 Summary

It looks like the default rootDir was ".", but for some reason, adding the src/version.js file changed the rootDir to "./src/".

I'm not sure why this is, looking at the TypeScript tsconfig reference docs for rootDir: https://www.typescriptlang.org/tsconfig/#rootDir, they say:

Default: The longest common path of all non-declaration input files.

Which should have already been ./src/?

Regardless, I've explicitly set rootDir: "." to generate the types at dist-types/src/index.d.ts instead of the dist-types/index.d.ts it's being exported to since 9a42e3c.

Fixes: 9a42e3c
Fixes: #803

📏 Design Decisions

N/A

📋 Tasks

Make sure you

• 📖 have read the contribution guidelines
• 💻 have added unit/e2e tests (if appropriate)
• 🔖 targeted master branch