Issue
I see the #549 changed the return types for createInputStream(). This is not longer type compatible with nodeJS pipe method.

Argument of type 'Writable' is not assignable to parameter of type 'WritableStream'. Property 'writable' is missing in type 'Writable'.

I also see some else is having a similar problem with the Buffer interface #559

Workaround
A temporary work around is for be to cast the return type to a Writable from the NodeJS stream library.

import { Writable } from "stream";
...
...
fs.createReadStream(objFile.path).pipe(workbook.xlsx.createInputStream() as Writable)
                    .on("done", () => {
                        resolve(workbook);
                    })
                    .on("error", (error2) => {
                        reject(error2);
                    });

To me this is not optimal since if the return type ever does change TypeScript won't find it as a error at compile time and would only be caught a run time.

Closing
I can create a PR this to revert it back to what it was. Unfortunately I have not used exceljs in a browser so I am not sure what issue this was causing. Not sure if @jloveridge could chime in on the browser side of things?