Add ability to read PDF files from stdin

[Fdawgs]

Describe the solution you'd like
Poppler Utils support the ability to read PDF files from stdin for most of the binaries (besides pdfattach, pdfdetach, pdfseparate, pdfunite).

The functionality for this would ideally be reflected in this wrapper module as well.

[markrummler]

I know you closed this a few months ago @Fdawgs but it seems there is a pretty easy implementation for a solution over on https://github.com/CodeDaraW/node-pdftocairo/blob/9e35c6d2e66926e870e4dc1240216b8bb449e8a6/src/index.ts#L170

I'd take a crack at a PR if you're interested but TS definitions are out of my wheelhouse.

[Fdawgs]

Brilliant, thanks @markrummler!
If you're willing to give it a shot that'd be great.