TypeScript type returned by parse is misleading

[danielnixon]

The return type in https://github.com/mozilla/readability/blob/main/index.d.ts is misleading. It doesn't include null/undefined in the types of values that can definitely be null or undefined. byline, for example, can commonly be null/undefined.

This has bitten me a few times while calling Readability from a TypeScript context.

It might be nice if we could update index.d.ts to reflect the types more accurately.

[gijsk]

None of the maintainers rely on or use the typescript definitions. They were externally contributed and merged; I'd be happy to take pull requests but that would be why the types listed may not be correct.

[danielnixon]

PR: #944