Fix Sphinx Documentation Build
Fix Sphinx Documentation Build

This resolves #1262.

Per this comment https://github.com/pypa/setuptools/issues/2548#issuecomment-771059348 and the Python docs https://docs.python.org/3/library/sys.html#sys.path, `sys.path` should only contain strings and not `Path` objects. Since we do not have dependencies frozen, a recent update to Sphinx broke the documentation build.
remotestorage/remotestorage.js,remotestorage/remotestorage.js,remotestorage/remotestorage.js