Version of PyMuPDF

[themantalope]

I ran into and error when using this executor out of the box. The issue is that after PyMuPDF v1.19.0, all methods are switched from camel case to snake case. Using the executor with the install_requirements=True results in an install with PyMuPDF >1.19.0, which then breaks the flow. The code in the executor will need to convert any PyMuPDF method call to snake case.