pdf.js and pdf.worker.js using different versions

[ryanburr]

Problem

It was noticed today that you are using a built version of pdf.js, but you are using a setting the PDFJS.workerSrc to an external version.

This is causing odd behavior if we have not updated to the latest version of this package. There is a more in depth conversation here

Solutions

1. Ensure that we have the latest version of your package (not very maintainable due to external library)
2. Point the PDFJS.workerSrc to the version that you build your package with
3. Allow users to opt out of using the pdf.worker.js library (PDFJS allows you to do this. An example can be found here)