Integrate Input#document

[romainmenke]

PostCSS 8.4.x started using Node.source.input.css more and more in various methods.
Mostly when calculating source positions (e.g. positionInside, rangeBy, ...).

This conflicted with how postcss-styled-syntax was implemented, so we added a new field through which custom syntax plugins can provide the entire document source.

const root = syntax.parse(
	cssSource,
	{
		document: jsSource,
		map: false,
	},
);

This is mostly important for linters where accurate positioning in the original source files is key.

It seemed that there was no test coverage for these postcss node methods so I've added one commit with some test coverage and a second where I integrated Input#document and updated postcss in the lock file.

[hudochenkov]

Thank you! This would explain regression I saw while updating to Stylelint 16.11.0+ (version, where new utilities for reported ranges were used).

I didn't feel comfortable with massive change in package-lock due to lockfile version change. So, if you can, could you rebase on main, please? main branch uses latest PostCSS version.

[romainmenke]

I didn't feel comfortable with massive change in package-lock due to lockfile version change.

Thank you for catching this!
Sorry for the inconvenience, I completely overlooked that the diff was larger than expected.

[hudochenkov]

Sorry for the inconvenience, I completely overlooked that the diff was larger than expected.

No worries :)

[hudochenkov]

Thank you for your help!